drivers/infiniband/hw/nes/nes_cm.c

   1 /*
   2  * Copyright (c) 2006 - 2009 Intel Corporation.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34
  35 #define TCPOPT_TIMESTAMP 8
  36
  37 #include <asm/atomic.h>
  38 #include <linux/skbuff.h>
  39 #include <linux/ip.h>
  40 #include <linux/tcp.h>
  41 #include <linux/init.h>
  42 #include <linux/if_arp.h>
  43 #include <linux/if_vlan.h>
  44 #include <linux/notifier.h>
  45 #include <linux/net.h>
  46 #include <linux/types.h>
  47 #include <linux/timer.h>
  48 #include <linux/time.h>
  49 #include <linux/delay.h>
  50 #include <linux/etherdevice.h>
  51 #include <linux/netdevice.h>
  52 #include <linux/random.h>
  53 #include <linux/list.h>
  54 #include <linux/threads.h>
  55 #include <linux/highmem.h>
  56 #include <net/arp.h>
  57 #include <net/neighbour.h>
  58 #include <net/route.h>
  59 #include <net/ip_fib.h>
  60 #include <net/tcp.h>
  61
  62 #include "nes.h"
  63
  64 u32 cm_packets_sent;
  65 u32 cm_packets_bounced;
  66 u32 cm_packets_dropped;
  67 u32 cm_packets_retrans;
  68 u32 cm_packets_created;
  69 u32 cm_packets_received;
  70 u32 cm_listens_created;
  71 u32 cm_listens_destroyed;
  72 u32 cm_backlog_drops;
  73 atomic_t cm_loopbacks;
  74 atomic_t cm_nodes_created;
  75 atomic_t cm_nodes_destroyed;
  76 atomic_t cm_accel_dropped_pkts;
  77 atomic_t cm_resets_recvd;
  78
  79 static inline int mini_cm_accelerated(struct nes_cm_core *,
  80         struct nes_cm_node *);
  81 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
  82         struct nes_vnic *, struct nes_cm_info *);
  83 static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
  84 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
  85         struct nes_vnic *, u16, void *, struct nes_cm_info *);
  86 static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
  87 static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
  88         struct nes_cm_node *);
  89 static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
  90         struct nes_cm_node *);
  91 static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
  92         struct sk_buff *);
  93 static int mini_cm_dealloc_core(struct nes_cm_core *);
  94 static int mini_cm_get(struct nes_cm_core *);
  95 static int mini_cm_set(struct nes_cm_core *, u32, u32);
  96
  97 static void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
  98         void *, u32, void *, u32, u8);
  99 static int add_ref_cm_node(struct nes_cm_node *);
 100 static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
 101
 102 static int nes_cm_disconn_true(struct nes_qp *);
 103 static int nes_cm_post_event(struct nes_cm_event *event);
 104 static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
 105 static void nes_disconnect_worker(struct work_struct *work);
 106
 107 static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
 108 static int send_mpa_reject(struct nes_cm_node *);
 109 static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
 110 static int send_reset(struct nes_cm_node *, struct sk_buff *);
 111 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
 112 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
 113 static void process_packet(struct nes_cm_node *, struct sk_buff *,
 114         struct nes_cm_core *);
 115
 116 static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
 117 static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
 118 static void cleanup_retrans_entry(struct nes_cm_node *);
 119 static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *);
 120 static void free_retrans_entry(struct nes_cm_node *cm_node);
 121 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
 122         struct sk_buff *skb, int optionsize, int passive);
 123
 124 /* CM event handler functions */
 125 static void cm_event_connected(struct nes_cm_event *);
 126 static void cm_event_connect_error(struct nes_cm_event *);
 127 static void cm_event_reset(struct nes_cm_event *);
 128 static void cm_event_mpa_req(struct nes_cm_event *);
 129 static void cm_event_mpa_reject(struct nes_cm_event *);
 130 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node);
 131
 132 static void print_core(struct nes_cm_core *core);
 133
 134 /* External CM API Interface */
 135 /* instance of function pointers for client API */
 136 /* set address of this instance to cm_core->cm_ops at cm_core alloc */
 137 static struct nes_cm_ops nes_cm_api = {
 138         mini_cm_accelerated,
 139         mini_cm_listen,
 140         mini_cm_del_listen,
 141         mini_cm_connect,
 142         mini_cm_close,
 143         mini_cm_accept,
 144         mini_cm_reject,
 145         mini_cm_recv_pkt,
 146         mini_cm_dealloc_core,
 147         mini_cm_get,
 148         mini_cm_set
 149 };
 150
 151 static struct nes_cm_core *g_cm_core;
 152
 153 atomic_t cm_connects;
 154 atomic_t cm_accepts;
 155 atomic_t cm_disconnects;
 156 atomic_t cm_closes;
 157 atomic_t cm_connecteds;
 158 atomic_t cm_connect_reqs;
 159 atomic_t cm_rejects;
 160
 161
 162 /**
 163  * create_event
 164  */
 165 static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
 166                 enum nes_cm_event_type type)
 167 {
 168         struct nes_cm_event *event;
 169
 170         if (!cm_node->cm_id)
 171                 return NULL;
 172
 173         /* allocate an empty event */
 174         event = kzalloc(sizeof(*event), GFP_ATOMIC);
 175
 176         if (!event)
 177                 return NULL;
 178
 179         event->type = type;
 180         event->cm_node = cm_node;
 181         event->cm_info.rem_addr = cm_node->rem_addr;
 182         event->cm_info.loc_addr = cm_node->loc_addr;
 183         event->cm_info.rem_port = cm_node->rem_port;
 184         event->cm_info.loc_port = cm_node->loc_port;
 185         event->cm_info.cm_id = cm_node->cm_id;
 186
 187         nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
 188                 "dst_addr=%08x[%x], src_addr=%08x[%x]\n",
 189                 cm_node, event, type, event->cm_info.loc_addr,
 190                 event->cm_info.loc_port, event->cm_info.rem_addr,
 191                 event->cm_info.rem_port);
 192
 193         nes_cm_post_event(event);
 194         return event;
 195 }
 196
 197
 198 /**
 199  * send_mpa_request
 200  */
 201 static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
 202 {
 203         if (!skb) {
 204                 nes_debug(NES_DBG_CM, "skb set to NULL\n");
 205                 return -1;
 206         }
 207
 208         /* send an MPA Request frame */
 209         form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
 210                         cm_node->mpa_frame_size, SET_ACK);
 211
 212         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 213 }
 214
 215
 216
 217 static int send_mpa_reject(struct nes_cm_node *cm_node)
 218 {
 219         struct sk_buff  *skb = NULL;
 220
 221         skb = dev_alloc_skb(MAX_CM_BUFFER);
 222         if (!skb) {
 223                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 224                 return -ENOMEM;
 225         }
 226
 227         /* send an MPA reject frame */
 228         form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
 229                         cm_node->mpa_frame_size, SET_ACK | SET_FIN);
 230
 231         cm_node->state = NES_CM_STATE_FIN_WAIT1;
 232         return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 233 }
 234
 235
 236 /**
 237  * recv_mpa - process a received TCP pkt, we are expecting an
 238  * IETF MPA frame
 239  */
 240 static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
 241                 u32 len)
 242 {
 243         struct ietf_mpa_frame *mpa_frame;
 244
 245         *type = NES_MPA_REQUEST_ACCEPT;
 246
 247         /* assume req frame is in tcp data payload */
 248         if (len < sizeof(struct ietf_mpa_frame)) {
 249                 nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
 250                 return -EINVAL;
 251         }
 252
 253         mpa_frame = (struct ietf_mpa_frame *)buffer;
 254         cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
 255         /* make sure mpa private data len is less than 512 bytes */
 256         if (cm_node->mpa_frame_size > IETF_MAX_PRIV_DATA_LEN) {
 257                 nes_debug(NES_DBG_CM, "The received Length of Private"
 258                         " Data field exceeds 512 octets\n");
 259                 return -EINVAL;
 260         }
 261         /*
 262          * make sure MPA receiver interoperate with the
 263          * received MPA version and MPA key information
 264          *
 265          */
 266         if (mpa_frame->rev != mpa_version) {
 267                 nes_debug(NES_DBG_CM, "The received mpa version"
 268                                 " can not be interoperated\n");
 269                 return -EINVAL;
 270         }
 271         if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) {
 272                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) {
 273                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
 274                         return -EINVAL;
 275                 }
 276         } else {
 277                 if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) {
 278                         nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n");
 279                         return -EINVAL;
 280                 }
 281         }
 282
 283         if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
 284                 nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
 285                                 " complete (%x + %x != %x)\n",
 286                                 cm_node->mpa_frame_size,
 287                                 (u32)sizeof(struct ietf_mpa_frame), len);
 288                 return -EINVAL;
 289         }
 290         /* make sure it does not exceed the max size */
 291         if (len > MAX_CM_BUFFER) {
 292                 nes_debug(NES_DBG_CM, "The received ietf buffer was too large"
 293                                 " (%x + %x != %x)\n",
 294                                 cm_node->mpa_frame_size,
 295                                 (u32)sizeof(struct ietf_mpa_frame), len);
 296                 return -EINVAL;
 297         }
 298
 299         /* copy entire MPA frame to our cm_node's frame */
 300         memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
 301                         cm_node->mpa_frame_size);
 302
 303         if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT)
 304                 *type = NES_MPA_REQUEST_REJECT;
 305         return 0;
 306 }
 307
 308
 309 /**
 310  * form_cm_frame - get a free packet and build empty frame Use
 311  * node info to build.
 312  */
 313 static void form_cm_frame(struct sk_buff *skb,
 314         struct nes_cm_node *cm_node, void *options, u32 optionsize,
 315         void *data, u32 datasize, u8 flags)
 316 {
 317         struct tcphdr *tcph;
 318         struct iphdr *iph;
 319         struct ethhdr *ethh;
 320         u8 *buf;
 321         u16 packetsize = sizeof(*iph);
 322
 323         packetsize += sizeof(*tcph);
 324         packetsize +=  optionsize + datasize;
 325
 326         memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
 327
 328         skb->len = 0;
 329         buf = skb_put(skb, packetsize + ETH_HLEN);
 330
 331         ethh = (struct ethhdr *) buf;
 332         buf += ETH_HLEN;
 333
 334         iph = (struct iphdr *)buf;
 335         buf += sizeof(*iph);
 336         tcph = (struct tcphdr *)buf;
 337         skb_reset_mac_header(skb);
 338         skb_set_network_header(skb, ETH_HLEN);
 339         skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
 340         buf += sizeof(*tcph);
 341
 342         skb->ip_summed = CHECKSUM_PARTIAL;
 343         skb->protocol = htons(0x800);
 344         skb->data_len = 0;
 345         skb->mac_len = ETH_HLEN;
 346
 347         memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
 348         memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
 349         ethh->h_proto = htons(0x0800);
 350
 351         iph->version = IPVERSION;
 352         iph->ihl = 5;           /* 5 * 4Byte words, IP headr len */
 353         iph->tos = 0;
 354         iph->tot_len = htons(packetsize);
 355         iph->id = htons(++cm_node->tcp_cntxt.loc_id);
 356
 357         iph->frag_off = htons(0x4000);
 358         iph->ttl = 0x40;
 359         iph->protocol = 0x06;   /* IPPROTO_TCP */
 360
 361         iph->saddr = htonl(cm_node->loc_addr);
 362         iph->daddr = htonl(cm_node->rem_addr);
 363
 364         tcph->source = htons(cm_node->loc_port);
 365         tcph->dest = htons(cm_node->rem_port);
 366         tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
 367
 368         if (flags & SET_ACK) {
 369                 cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
 370                 tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
 371                 tcph->ack = 1;
 372         } else
 373                 tcph->ack_seq = 0;
 374
 375         if (flags & SET_SYN) {
 376                 cm_node->tcp_cntxt.loc_seq_num++;
 377                 tcph->syn = 1;
 378         } else
 379                 cm_node->tcp_cntxt.loc_seq_num += datasize;
 380
 381         if (flags & SET_FIN) {
 382                 cm_node->tcp_cntxt.loc_seq_num++;
 383                 tcph->fin = 1;
 384         }
 385
 386         if (flags & SET_RST)
 387                 tcph->rst = 1;
 388
 389         tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
 390         tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
 391         tcph->urg_ptr = 0;
 392         if (optionsize)
 393                 memcpy(buf, options, optionsize);
 394         buf += optionsize;
 395         if (datasize)
 396                 memcpy(buf, data, datasize);
 397
 398         skb_shinfo(skb)->nr_frags = 0;
 399         cm_packets_created++;
 400
 401 }
 402
 403
 404 /**
 405  * print_core - dump a cm core
 406  */
 407 static void print_core(struct nes_cm_core *core)
 408 {
 409         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 410         nes_debug(NES_DBG_CM, "CM Core  -- (core = %p )\n", core);
 411         if (!core)
 412                 return;
 413         nes_debug(NES_DBG_CM, "---------------------------------------------\n");
 414
 415         nes_debug(NES_DBG_CM, "State         : %u \n",  core->state);
 416
 417         nes_debug(NES_DBG_CM, "Listen Nodes  : %u \n", atomic_read(&core->listen_node_cnt));
 418         nes_debug(NES_DBG_CM, "Active Nodes  : %u \n", atomic_read(&core->node_cnt));
 419
 420         nes_debug(NES_DBG_CM, "core          : %p \n", core);
 421
 422         nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
 423 }
 424
 425
 426 /**
 427  * schedule_nes_timer
 428  * note - cm_node needs to be protected before calling this. Encase in:
 429  *                      rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
 430  */
 431 int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
 432                 enum nes_timer_type type, int send_retrans,
 433                 int close_when_complete)
 434 {
 435         unsigned long  flags;
 436         struct nes_cm_core *cm_core = cm_node->cm_core;
 437         struct nes_timer_entry *new_send;
 438         int ret = 0;
 439         u32 was_timer_set;
 440
 441         new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
 442         if (!new_send)
 443                 return -ENOMEM;
 444
 445         /* new_send->timetosend = currenttime */
 446         new_send->retrycount = NES_DEFAULT_RETRYS;
 447         new_send->retranscount = NES_DEFAULT_RETRANS;
 448         new_send->skb = skb;
 449         new_send->timetosend = jiffies;
 450         new_send->type = type;
 451         new_send->netdev = cm_node->netdev;
 452         new_send->send_retrans = send_retrans;
 453         new_send->close_when_complete = close_when_complete;
 454
 455         if (type == NES_TIMER_TYPE_CLOSE) {
 456                 new_send->timetosend += (HZ/10);
 457                 if (cm_node->recv_entry) {
 458                         kfree(new_send);
 459                         WARN_ON(1);
 460                         return -EINVAL;
 461                 }
 462                 cm_node->recv_entry = new_send;
 463         }
 464
 465         if (type == NES_TIMER_TYPE_SEND) {
 466                 new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
 467                 atomic_inc(&new_send->skb->users);
 468                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 469                 cm_node->send_entry = new_send;
 470                 add_ref_cm_node(cm_node);
 471                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 472                 new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
 473
 474                 ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
 475                 if (ret != NETDEV_TX_OK) {
 476                         nes_debug(NES_DBG_CM, "Error sending packet %p "
 477                                 "(jiffies = %lu)\n", new_send, jiffies);
 478                         new_send->timetosend = jiffies;
 479                         ret = NETDEV_TX_OK;
 480                 } else {
 481                         cm_packets_sent++;
 482                         if (!send_retrans) {
 483                                 cleanup_retrans_entry(cm_node);
 484                                 if (close_when_complete)
 485                                         rem_ref_cm_node(cm_core, cm_node);
 486                                 return ret;
 487                         }
 488                 }
 489         }
 490
 491         was_timer_set = timer_pending(&cm_core->tcp_timer);
 492
 493         if (!was_timer_set) {
 494                 cm_core->tcp_timer.expires = new_send->timetosend;
 495                 add_timer(&cm_core->tcp_timer);
 496         }
 497
 498         return ret;
 499 }
 500
 501 static void nes_retrans_expired(struct nes_cm_node *cm_node)
 502 {
 503         struct iw_cm_id *cm_id = cm_node->cm_id;
 504         switch (cm_node->state) {
 505         case NES_CM_STATE_SYN_RCVD:
 506         case NES_CM_STATE_CLOSING:
 507                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 508                 break;
 509         case NES_CM_STATE_LAST_ACK:
 510         case NES_CM_STATE_FIN_WAIT1:
 511                 if (cm_node->cm_id)
 512                         cm_id->rem_ref(cm_id);
 513                 cm_node->state = NES_CM_STATE_CLOSED;
 514                 send_reset(cm_node, NULL);
 515                 break;
 516         default:
 517                 add_ref_cm_node(cm_node);
 518                 send_reset(cm_node, NULL);
 519                 create_event(cm_node, NES_CM_EVENT_ABORTED);
 520         }
 521 }
 522
 523 static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node)
 524 {
 525         struct nes_timer_entry *recv_entry = cm_node->recv_entry;
 526         struct iw_cm_id *cm_id = cm_node->cm_id;
 527         struct nes_qp *nesqp;
 528         unsigned long qplockflags;
 529
 530         if (!recv_entry)
 531                 return;
 532         nesqp = (struct nes_qp *)recv_entry->skb;
 533         if (nesqp) {
 534                 spin_lock_irqsave(&nesqp->lock, qplockflags);
 535                 if (nesqp->cm_id) {
 536                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 537                                 "refcount = %d: HIT A "
 538                                 "NES_TIMER_TYPE_CLOSE with something "
 539                                 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 540                                 atomic_read(&nesqp->refcount));
 541                         nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
 542                         nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
 543                         nesqp->ibqp_state = IB_QPS_ERR;
 544                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 545                         nes_cm_disconn(nesqp);
 546                 } else {
 547                         spin_unlock_irqrestore(&nesqp->lock, qplockflags);
 548                         nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
 549                                 "refcount = %d: HIT A "
 550                                 "NES_TIMER_TYPE_CLOSE with nothing "
 551                                 "to do!!!\n", nesqp->hwqp.qp_id, cm_id,
 552                                 atomic_read(&nesqp->refcount));
 553                 }
 554         } else if (rem_node) {
 555                 /* TIME_WAIT state */
 556                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 557         }
 558         if (cm_node->cm_id)
 559                 cm_id->rem_ref(cm_id);
 560         kfree(recv_entry);
 561         cm_node->recv_entry = NULL;
 562 }
 563
 564 /**
 565  * nes_cm_timer_tick
 566  */
 567 static void nes_cm_timer_tick(unsigned long pass)
 568 {
 569         unsigned long flags;
 570         unsigned long nexttimeout = jiffies + NES_LONG_TIME;
 571         struct nes_cm_node *cm_node;
 572         struct nes_timer_entry *send_entry, *recv_entry;
 573         struct list_head *list_core_temp;
 574         struct list_head *list_node;
 575         struct nes_cm_core *cm_core = g_cm_core;
 576         u32 settimer = 0;
 577         unsigned long timetosend;
 578         int ret = NETDEV_TX_OK;
 579
 580         struct list_head timer_list;
 581         INIT_LIST_HEAD(&timer_list);
 582         spin_lock_irqsave(&cm_core->ht_lock, flags);
 583
 584         list_for_each_safe(list_node, list_core_temp,
 585                                 &cm_core->connected_nodes) {
 586                 cm_node = container_of(list_node, struct nes_cm_node, list);
 587                 if ((cm_node->recv_entry) || (cm_node->send_entry)) {
 588                         add_ref_cm_node(cm_node);
 589                         list_add(&cm_node->timer_entry, &timer_list);
 590                 }
 591         }
 592         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 593
 594         list_for_each_safe(list_node, list_core_temp, &timer_list) {
 595                 cm_node = container_of(list_node, struct nes_cm_node,
 596                                         timer_entry);
 597                 recv_entry = cm_node->recv_entry;
 598
 599                 if (recv_entry) {
 600                         if (time_after(recv_entry->timetosend, jiffies)) {
 601                                 if (nexttimeout > recv_entry->timetosend ||
 602                                                 !settimer) {
 603                                         nexttimeout = recv_entry->timetosend;
 604                                         settimer = 1;
 605                                 }
 606                         } else
 607                                 handle_recv_entry(cm_node, 1);
 608                 }
 609
 610                 spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 611                 do {
 612                         send_entry = cm_node->send_entry;
 613                         if (!send_entry)
 614                                 break;
 615                         if (time_after(send_entry->timetosend, jiffies)) {
 616                                 if (cm_node->state != NES_CM_STATE_TSA) {
 617                                         if ((nexttimeout >
 618                                                 send_entry->timetosend) ||
 619                                                 !settimer) {
 620                                                 nexttimeout =
 621                                                         send_entry->timetosend;
 622                                                 settimer = 1;
 623                                         }
 624                                 } else {
 625                                         free_retrans_entry(cm_node);
 626                                 }
 627                                 break;
 628                         }
 629
 630                         if ((cm_node->state == NES_CM_STATE_TSA) ||
 631                                 (cm_node->state == NES_CM_STATE_CLOSED)) {
 632                                 free_retrans_entry(cm_node);
 633                                 break;
 634                         }
 635
 636                         if (!send_entry->retranscount ||
 637                                 !send_entry->retrycount) {
 638                                 cm_packets_dropped++;
 639                                 free_retrans_entry(cm_node);
 640
 641                                 spin_unlock_irqrestore(
 642                                         &cm_node->retrans_list_lock, flags);
 643                                 nes_retrans_expired(cm_node);
 644                                 cm_node->state = NES_CM_STATE_CLOSED;
 645                                 spin_lock_irqsave(&cm_node->retrans_list_lock,
 646                                         flags);
 647                                 break;
 648                         }
 649                         atomic_inc(&send_entry->skb->users);
 650                         cm_packets_retrans++;
 651                         nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
 652                                 "for node %p, jiffies = %lu, time to send = "
 653                                 "%lu, retranscount = %u, send_entry->seq_num = "
 654                                 "0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
 655                                 "0x%08X\n", send_entry, cm_node, jiffies,
 656                                 send_entry->timetosend,
 657                                 send_entry->retranscount,
 658                                 send_entry->seq_num,
 659                                 cm_node->tcp_cntxt.rem_ack_num);
 660
 661                         spin_unlock_irqrestore(&cm_node->retrans_list_lock,
 662                                 flags);
 663                         ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
 664                         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
 665                         if (ret != NETDEV_TX_OK) {
 666                                 nes_debug(NES_DBG_CM, "rexmit failed for "
 667                                         "node=%p\n", cm_node);
 668                                 cm_packets_bounced++;
 669                                 send_entry->retrycount--;
 670                                 nexttimeout = jiffies + NES_SHORT_TIME;
 671                                 settimer = 1;
 672                                 break;
 673                         } else {
 674                                 cm_packets_sent++;
 675                         }
 676                         nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
 677                                 "%u, retry count = %u.\n",
 678                                 send_entry->retranscount,
 679                                 send_entry->retrycount);
 680                         if (send_entry->send_retrans) {
 681                                 send_entry->retranscount--;
 682                                 timetosend = (NES_RETRY_TIMEOUT <<
 683                                         (NES_DEFAULT_RETRANS - send_entry->retranscount));
 684
 685                                 send_entry->timetosend = jiffies +
 686                                         min(timetosend, NES_MAX_TIMEOUT);
 687                                 if (nexttimeout > send_entry->timetosend ||
 688                                         !settimer) {
 689                                         nexttimeout = send_entry->timetosend;
 690                                         settimer = 1;
 691                                 }
 692                         } else {
 693                                 int close_when_complete;
 694                                 close_when_complete =
 695                                         send_entry->close_when_complete;
 696                                 nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
 697                                         cm_node, cm_node->state);
 698                                 free_retrans_entry(cm_node);
 699                                 if (close_when_complete)
 700                                         rem_ref_cm_node(cm_node->cm_core,
 701                                                 cm_node);
 702                         }
 703                 } while (0);
 704
 705                 spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
 706                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 707         }
 708
 709         if (settimer) {
 710                 if (!timer_pending(&cm_core->tcp_timer)) {
 711                         cm_core->tcp_timer.expires  = nexttimeout;
 712                         add_timer(&cm_core->tcp_timer);
 713                 }
 714         }
 715 }
 716
 717
 718 /**
 719  * send_syn
 720  */
 721 static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
 722         struct sk_buff *skb)
 723 {
 724         int ret;
 725         int flags = SET_SYN;
 726         char optionsbuffer[sizeof(struct option_mss) +
 727                 sizeof(struct option_windowscale) + sizeof(struct option_base) +
 728                 TCP_OPTIONS_PADDING];
 729
 730         int optionssize = 0;
 731         /* Sending MSS option */
 732         union all_known_options *options;
 733
 734         if (!cm_node)
 735                 return -EINVAL;
 736
 737         options = (union all_known_options *)&optionsbuffer[optionssize];
 738         options->as_mss.optionnum = OPTION_NUMBER_MSS;
 739         options->as_mss.length = sizeof(struct option_mss);
 740         options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
 741         optionssize += sizeof(struct option_mss);
 742
 743         options = (union all_known_options *)&optionsbuffer[optionssize];
 744         options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
 745         options->as_windowscale.length = sizeof(struct option_windowscale);
 746         options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
 747         optionssize += sizeof(struct option_windowscale);
 748
 749         if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
 750                 options = (union all_known_options *)&optionsbuffer[optionssize];
 751                 options->as_base.optionnum = OPTION_NUMBER_WRITE0;
 752                 options->as_base.length = sizeof(struct option_base);
 753                 optionssize += sizeof(struct option_base);
 754                 /* we need the size to be a multiple of 4 */
 755                 options = (union all_known_options *)&optionsbuffer[optionssize];
 756                 options->as_end = 1;
 757                 optionssize += 1;
 758                 options = (union all_known_options *)&optionsbuffer[optionssize];
 759                 options->as_end = 1;
 760                 optionssize += 1;
 761         }
 762
 763         options = (union all_known_options *)&optionsbuffer[optionssize];
 764         options->as_end = OPTION_NUMBER_END;
 765         optionssize += 1;
 766
 767         if (!skb)
 768                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 769         if (!skb) {
 770                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 771                 return -1;
 772         }
 773
 774         if (sendack)
 775                 flags |= SET_ACK;
 776
 777         form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
 778         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 779
 780         return ret;
 781 }
 782
 783
 784 /**
 785  * send_reset
 786  */
 787 static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
 788 {
 789         int ret;
 790         int flags = SET_RST | SET_ACK;
 791
 792         if (!skb)
 793                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 794         if (!skb) {
 795                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 796                 return -ENOMEM;
 797         }
 798
 799         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
 800         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
 801
 802         return ret;
 803 }
 804
 805
 806 /**
 807  * send_ack
 808  */
 809 static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
 810 {
 811         int ret;
 812
 813         if (!skb)
 814                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 815
 816         if (!skb) {
 817                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 818                 return -1;
 819         }
 820
 821         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
 822         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
 823
 824         return ret;
 825 }
 826
 827
 828 /**
 829  * send_fin
 830  */
 831 static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
 832 {
 833         int ret;
 834
 835         /* if we didn't get a frame get one */
 836         if (!skb)
 837                 skb = dev_alloc_skb(MAX_CM_BUFFER);
 838
 839         if (!skb) {
 840                 nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
 841                 return -1;
 842         }
 843
 844         form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
 845         ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
 846
 847         return ret;
 848 }
 849
 850
 851 /**
 852  * find_node - find a cm node that matches the reference cm node
 853  */
 854 static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
 855                 u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
 856 {
 857         unsigned long flags;
 858         struct list_head *hte;
 859         struct nes_cm_node *cm_node;
 860
 861         /* get a handle on the hte */
 862         hte = &cm_core->connected_nodes;
 863
 864         /* walk list and find cm_node associated with this session ID */
 865         spin_lock_irqsave(&cm_core->ht_lock, flags);
 866         list_for_each_entry(cm_node, hte, list) {
 867                 /* compare quad, return node handle if a match */
 868                 nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
 869                                 cm_node->loc_addr, cm_node->loc_port,
 870                                 loc_addr, loc_port,
 871                                 cm_node->rem_addr, cm_node->rem_port,
 872                                 rem_addr, rem_port);
 873                 if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
 874                                 (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
 875                         add_ref_cm_node(cm_node);
 876                         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 877                         return cm_node;
 878                 }
 879         }
 880         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 881
 882         /* no owner node */
 883         return NULL;
 884 }
 885
 886
 887 /**
 888  * find_listener - find a cm node listening on this addr-port pair
 889  */
 890 static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
 891                 nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
 892 {
 893         unsigned long flags;
 894         struct nes_cm_listener *listen_node;
 895
 896         /* walk list and find cm_node associated with this session ID */
 897         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
 898         list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
 899                 /* compare node pair, return node handle if a match */
 900                 if (((listen_node->loc_addr == dst_addr) ||
 901                                 listen_node->loc_addr == 0x00000000) &&
 902                                 (listen_node->loc_port == dst_port) &&
 903                                 (listener_state & listen_node->listener_state)) {
 904                         atomic_inc(&listen_node->ref_count);
 905                         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
 906                         return listen_node;
 907                 }
 908         }
 909         spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
 910
 911         /* no listener */
 912         return NULL;
 913 }
 914
 915
 916 /**
 917  * add_hte_node - add a cm node to the hash table
 918  */
 919 static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
 920 {
 921         unsigned long flags;
 922         struct list_head *hte;
 923
 924         if (!cm_node || !cm_core)
 925                 return -EINVAL;
 926
 927         nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
 928                 cm_node);
 929
 930         spin_lock_irqsave(&cm_core->ht_lock, flags);
 931
 932         /* get a handle on the hash table element (list head for this slot) */
 933         hte = &cm_core->connected_nodes;
 934         list_add_tail(&cm_node->list, hte);
 935         atomic_inc(&cm_core->ht_node_cnt);
 936
 937         spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 938
 939         return 0;
 940 }
 941
 942
 943 /**
 944  * mini_cm_dec_refcnt_listen
 945  */
 946 static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
 947         struct nes_cm_listener *listener, int free_hanging_nodes)
 948 {
 949         int ret = -EINVAL;
 950         int err = 0;
 951         unsigned long flags;
 952         struct list_head *list_pos = NULL;
 953         struct list_head *list_temp = NULL;
 954         struct nes_cm_node *cm_node = NULL;
 955         struct list_head reset_list;
 956
 957         nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
 958                 "refcnt=%d\n", listener, free_hanging_nodes,
 959                 atomic_read(&listener->ref_count));
 960         /* free non-accelerated child nodes for this listener */
 961         INIT_LIST_HEAD(&reset_list);
 962         if (free_hanging_nodes) {
 963                 spin_lock_irqsave(&cm_core->ht_lock, flags);
 964                 list_for_each_safe(list_pos, list_temp,
 965                                    &g_cm_core->connected_nodes) {
 966                         cm_node = container_of(list_pos, struct nes_cm_node,
 967                                 list);
 968                         if ((cm_node->listener == listener) &&
 969                             (!cm_node->accelerated)) {
 970                                 add_ref_cm_node(cm_node);
 971                                 list_add(&cm_node->reset_entry, &reset_list);
 972                         }
 973                 }
 974                 spin_unlock_irqrestore(&cm_core->ht_lock, flags);
 975         }
 976
 977         list_for_each_safe(list_pos, list_temp, &reset_list) {
 978                 cm_node = container_of(list_pos, struct nes_cm_node,
 979                                 reset_entry);
 980                 {
 981                         struct nes_cm_node *loopback = cm_node->loopbackpartner;
 982                         enum nes_cm_node_state old_state;
 983                         if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) {
 984                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
 985                         } else {
 986                                 if (!loopback) {
 987                                         cleanup_retrans_entry(cm_node);
 988                                         err = send_reset(cm_node, NULL);
 989                                         if (err) {
 990                                                 cm_node->state =
 991                                                          NES_CM_STATE_CLOSED;
 992                                                 WARN_ON(1);
 993                                         } else {
 994                                                 old_state = cm_node->state;
 995                                                 cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
 996                                                 if (old_state != NES_CM_STATE_MPAREQ_RCVD)
 997                                                         rem_ref_cm_node(
 998                                                                 cm_node->cm_core,
 999                                                                 cm_node);
1000                                         }
1001                                 } else {
1002                                         struct nes_cm_event event;
1003
1004                                         event.cm_node = loopback;
1005                                         event.cm_info.rem_addr =
1006                                                         loopback->rem_addr;
1007                                         event.cm_info.loc_addr =
1008                                                         loopback->loc_addr;
1009                                         event.cm_info.rem_port =
1010                                                         loopback->rem_port;
1011                                         event.cm_info.loc_port =
1012                                                          loopback->loc_port;
1013                                         event.cm_info.cm_id = loopback->cm_id;
1014                                         cm_event_connect_error(&event);
1015                                         cm_node->state = NES_CM_STATE_LISTENER_DESTROYED;
1016                                         loopback->state = NES_CM_STATE_CLOSED;
1017
1018                                         rem_ref_cm_node(cm_node->cm_core,
1019                                                          cm_node);
1020
1021                                 }
1022                         }
1023                 }
1024         }
1025
1026         spin_lock_irqsave(&cm_core->listen_list_lock, flags);
1027         if (!atomic_dec_return(&listener->ref_count)) {
1028                 list_del(&listener->list);
1029
1030                 /* decrement our listen node count */
1031                 atomic_dec(&cm_core->listen_node_cnt);
1032
1033                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1034
1035                 if (listener->nesvnic) {
1036                         nes_manage_apbvt(listener->nesvnic, listener->loc_port,
1037                                         PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
1038                 }
1039
1040                 nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
1041
1042                 kfree(listener);
1043                 listener = NULL;
1044                 ret = 0;
1045                 cm_listens_destroyed++;
1046         } else {
1047                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
1048         }
1049         if (listener) {
1050                 if (atomic_read(&listener->pend_accepts_cnt) > 0)
1051                         nes_debug(NES_DBG_CM, "destroying listener (%p)"
1052                                         " with non-zero pending accepts=%u\n",
1053                                         listener, atomic_read(&listener->pend_accepts_cnt));
1054         }
1055
1056         return ret;
1057 }
1058
1059
1060 /**
1061  * mini_cm_del_listen
1062  */
1063 static int mini_cm_del_listen(struct nes_cm_core *cm_core,
1064                 struct nes_cm_listener *listener)
1065 {
1066         listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
1067         listener->cm_id = NULL; /* going to be destroyed pretty soon */
1068         return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
1069 }
1070
1071
1072 /**
1073  * mini_cm_accelerated
1074  */
1075 static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
1076                 struct nes_cm_node *cm_node)
1077 {
1078         u32 was_timer_set;
1079         cm_node->accelerated = 1;
1080
1081         if (cm_node->accept_pend) {
1082                 BUG_ON(!cm_node->listener);
1083                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1084                 cm_node->accept_pend = 0;
1085                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1086         }
1087
1088         was_timer_set = timer_pending(&cm_core->tcp_timer);
1089         if (!was_timer_set) {
1090                 cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
1091                 add_timer(&cm_core->tcp_timer);
1092         }
1093
1094         return 0;
1095 }
1096
1097
1098 /**
1099  * nes_addr_resolve_neigh
1100  */
1101 static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex)
1102 {
1103         struct rtable *rt;
1104         struct flowi fl;
1105         struct neighbour *neigh;
1106         int rc = arpindex;
1107         struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter;
1108
1109         memset(&fl, 0, sizeof fl);
1110         fl.nl_u.ip4_u.daddr = htonl(dst_ip);
1111         if (ip_route_output_key(&init_net, &rt, &fl)) {
1112                 printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n",
1113                                 __func__, dst_ip);
1114                 return rc;
1115         }
1116
1117         neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
1118         if (neigh) {
1119                 if (neigh->nud_state & NUD_VALID) {
1120                         nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
1121                                   " is %pM, Gateway is 0x%08X \n", dst_ip,
1122                                   neigh->ha, ntohl(rt->rt_gateway));
1123
1124                         if (arpindex >= 0) {
1125                                 if (!memcmp(nesadapter->arp_table[arpindex].mac_addr,
1126                                                         neigh->ha, ETH_ALEN)){
1127                                         /* Mac address same as in nes_arp_table */
1128                                         neigh_release(neigh);
1129                                         ip_rt_put(rt);
1130                                         return rc;
1131                                 }
1132
1133                                 nes_manage_arp_cache(nesvnic->netdev,
1134                                                 nesadapter->arp_table[arpindex].mac_addr,
1135                                                 dst_ip, NES_ARP_DELETE);
1136                         }
1137
1138                         nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
1139                                              dst_ip, NES_ARP_ADD);
1140                         rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
1141                                            NES_ARP_RESOLVE);
1142                 }
1143                 neigh_release(neigh);
1144         }
1145
1146         if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
1147                 neigh_event_send(rt->u.dst.neighbour, NULL);
1148
1149         ip_rt_put(rt);
1150         return rc;
1151 }
1152
1153 /**
1154  * make_cm_node - create a new instance of a cm node
1155  */
1156 static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
1157                 struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
1158                 struct nes_cm_listener *listener)
1159 {
1160         struct nes_cm_node *cm_node;
1161         struct timespec ts;
1162         int oldarpindex = 0;
1163         int arpindex = 0;
1164         struct nes_device *nesdev;
1165         struct nes_adapter *nesadapter;
1166
1167         /* create an hte and cm_node for this instance */
1168         cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
1169         if (!cm_node)
1170                 return NULL;
1171
1172         /* set our node specific transport info */
1173         cm_node->loc_addr = cm_info->loc_addr;
1174         cm_node->rem_addr = cm_info->rem_addr;
1175         cm_node->loc_port = cm_info->loc_port;
1176         cm_node->rem_port = cm_info->rem_port;
1177         cm_node->send_write0 = send_first;
1178         nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
1179                   &cm_node->loc_addr, cm_node->loc_port,
1180                   &cm_node->rem_addr, cm_node->rem_port);
1181         cm_node->listener = listener;
1182         cm_node->netdev = nesvnic->netdev;
1183         cm_node->cm_id = cm_info->cm_id;
1184         memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
1185
1186         nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
1187                         cm_node->cm_id);
1188
1189         spin_lock_init(&cm_node->retrans_list_lock);
1190
1191         cm_node->loopbackpartner = NULL;
1192         atomic_set(&cm_node->ref_count, 1);
1193         /* associate our parent CM core */
1194         cm_node->cm_core = cm_core;
1195         cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
1196         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
1197         cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
1198                         NES_CM_DEFAULT_RCV_WND_SCALE;
1199         ts = current_kernel_time();
1200         cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
1201         cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
1202                         sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
1203         cm_node->tcp_cntxt.rcv_nxt = 0;
1204         /* get a unique session ID , add thread_id to an upcounter to handle race */
1205         atomic_inc(&cm_core->node_cnt);
1206         cm_node->conn_type = cm_info->conn_type;
1207         cm_node->apbvt_set = 0;
1208         cm_node->accept_pend = 0;
1209
1210         cm_node->nesvnic = nesvnic;
1211         /* get some device handles, for arp lookup */
1212         nesdev = nesvnic->nesdev;
1213         nesadapter = nesdev->nesadapter;
1214
1215         cm_node->loopbackpartner = NULL;
1216
1217         /* get the mac addr for the remote node */
1218         if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
1219                 arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
1220         else {
1221                 oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
1222                 arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr, oldarpindex);
1223
1224         }
1225         if (arpindex < 0) {
1226                 kfree(cm_node);
1227                 return NULL;
1228         }
1229
1230         /* copy the mac addr to node context */
1231         memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
1232         nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
1233                   cm_node->rem_mac);
1234
1235         add_hte_node(cm_core, cm_node);
1236         atomic_inc(&cm_nodes_created);
1237
1238         return cm_node;
1239 }
1240
1241
1242 /**
1243  * add_ref_cm_node - destroy an instance of a cm node
1244  */
1245 static int add_ref_cm_node(struct nes_cm_node *cm_node)
1246 {
1247         atomic_inc(&cm_node->ref_count);
1248         return 0;
1249 }
1250
1251
1252 /**
1253  * rem_ref_cm_node - destroy an instance of a cm node
1254  */
1255 static int rem_ref_cm_node(struct nes_cm_core *cm_core,
1256         struct nes_cm_node *cm_node)
1257 {
1258         unsigned long flags;
1259         struct nes_qp *nesqp;
1260
1261         if (!cm_node)
1262                 return -EINVAL;
1263
1264         spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
1265         if (atomic_dec_return(&cm_node->ref_count)) {
1266                 spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1267                 return 0;
1268         }
1269         list_del(&cm_node->list);
1270         atomic_dec(&cm_core->ht_node_cnt);
1271         spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
1272
1273         /* if the node is destroyed before connection was accelerated */
1274         if (!cm_node->accelerated && cm_node->accept_pend) {
1275                 BUG_ON(!cm_node->listener);
1276                 atomic_dec(&cm_node->listener->pend_accepts_cnt);
1277                 BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
1278         }
1279         WARN_ON(cm_node->send_entry);
1280         if (cm_node->recv_entry)
1281                 handle_recv_entry(cm_node, 0);
1282         if (cm_node->listener) {
1283                 mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
1284         } else {
1285                 if (cm_node->apbvt_set && cm_node->nesvnic) {
1286                         nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
1287                                 PCI_FUNC(
1288                                 cm_node->nesvnic->nesdev->pcidev->devfn),
1289                                 NES_MANAGE_APBVT_DEL);
1290                 }
1291         }
1292
1293         atomic_dec(&cm_core->node_cnt);
1294         atomic_inc(&cm_nodes_destroyed);
1295         nesqp = cm_node->nesqp;
1296         if (nesqp) {
1297                 nesqp->cm_node = NULL;
1298                 nes_rem_ref(&nesqp->ibqp);
1299                 cm_node->nesqp = NULL;
1300         }
1301
1302         kfree(cm_node);
1303         return 0;
1304 }
1305
1306 /**
1307  * process_options
1308  */
1309 static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
1310         u32 optionsize, u32 syn_packet)
1311 {
1312         u32 tmp;
1313         u32 offset = 0;
1314         union all_known_options *all_options;
1315         char got_mss_option = 0;
1316
1317         while (offset < optionsize) {
1318                 all_options = (union all_known_options *)(optionsloc + offset);
1319                 switch (all_options->as_base.optionnum) {
1320                 case OPTION_NUMBER_END:
1321                         offset = optionsize;
1322                         break;
1323                 case OPTION_NUMBER_NONE:
1324                         offset += 1;
1325                         continue;
1326                 case OPTION_NUMBER_MSS:
1327                         nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
1328                                 "Size: %d\n", __func__,
1329                                 all_options->as_mss.length, offset, optionsize);
1330                         got_mss_option = 1;
1331                         if (all_options->as_mss.length != 4) {
1332                                 return 1;
1333                         } else {
1334                                 tmp = ntohs(all_options->as_mss.mss);
1335                                 if (tmp > 0 && tmp <
1336                                         cm_node->tcp_cntxt.mss)
1337                                         cm_node->tcp_cntxt.mss = tmp;
1338                         }
1339                         break;
1340                 case OPTION_NUMBER_WINDOW_SCALE:
1341                         cm_node->tcp_cntxt.snd_wscale =
1342                                 all_options->as_windowscale.shiftcount;
1343                         break;
1344                 case OPTION_NUMBER_WRITE0:
1345                         cm_node->send_write0 = 1;
1346                         break;
1347                 default:
1348                         nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
1349                                 all_options->as_base.optionnum);
1350                         break;
1351                 }
1352                 offset += all_options->as_base.length;
1353         }
1354         if ((!got_mss_option) && (syn_packet))
1355                 cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
1356         return 0;
1357 }
1358
1359 static void drop_packet(struct sk_buff *skb)
1360 {
1361         atomic_inc(&cm_accel_dropped_pkts);
1362         dev_kfree_skb_any(skb);
1363 }
1364
1365 static void handle_fin_pkt(struct nes_cm_node *cm_node)
1366 {
1367         nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
1368                 "refcnt=%d\n", cm_node, cm_node->state,
1369                 atomic_read(&cm_node->ref_count));
1370         switch (cm_node->state) {
1371         case NES_CM_STATE_SYN_RCVD:
1372         case NES_CM_STATE_SYN_SENT:
1373         case NES_CM_STATE_ESTABLISHED:
1374         case NES_CM_STATE_MPAREJ_RCVD:
1375                 cm_node->tcp_cntxt.rcv_nxt++;
1376                 cleanup_retrans_entry(cm_node);
1377                 cm_node->state = NES_CM_STATE_LAST_ACK;
1378                 send_fin(cm_node, NULL);
1379                 break;
1380         case NES_CM_STATE_MPAREQ_SENT:
1381                 create_event(cm_node, NES_CM_EVENT_ABORTED);
1382                 cm_node->tcp_cntxt.rcv_nxt++;
1383                 cleanup_retrans_entry(cm_node);
1384                 cm_node->state = NES_CM_STATE_CLOSED;
1385                 add_ref_cm_node(cm_node);
1386                 send_reset(cm_node, NULL);
1387                 break;
1388         case NES_CM_STATE_FIN_WAIT1:
1389                 cm_node->tcp_cntxt.rcv_nxt++;
1390                 cleanup_retrans_entry(cm_node);
1391                 cm_node->state = NES_CM_STATE_CLOSING;
1392                 send_ack(cm_node, NULL);
1393                 /* Wait for ACK as this is simultanous close..
1394                 * After we receive ACK, do not send anything..
1395                 * Just rm the node.. Done.. */
1396                 break;
1397         case NES_CM_STATE_FIN_WAIT2:
1398                 cm_node->tcp_cntxt.rcv_nxt++;
1399                 cleanup_retrans_entry(cm_node);
1400                 cm_node->state = NES_CM_STATE_TIME_WAIT;
1401                 send_ack(cm_node, NULL);
1402                 schedule_nes_timer(cm_node, NULL,  NES_TIMER_TYPE_CLOSE, 1, 0);
1403                 break;
1404         case NES_CM_STATE_TIME_WAIT:
1405                 cm_node->tcp_cntxt.rcv_nxt++;
1406                 cleanup_retrans_entry(cm_node);
1407                 cm_node->state = NES_CM_STATE_CLOSED;
1408                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1409                 break;
1410         case NES_CM_STATE_TSA:
1411         default:
1412                 nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
1413                         cm_node, cm_node->state);
1414                 break;
1415         }
1416 }
1417
1418
1419 static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1420         struct tcphdr *tcph)
1421 {
1422
1423         int     reset = 0;      /* whether to send reset in case of err.. */
1424         int     passive_state;
1425         atomic_inc(&cm_resets_recvd);
1426         nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
1427                         " refcnt=%d\n", cm_node, cm_node->state,
1428                         atomic_read(&cm_node->ref_count));
1429         cleanup_retrans_entry(cm_node);
1430         switch (cm_node->state) {
1431         case NES_CM_STATE_SYN_SENT:
1432         case NES_CM_STATE_MPAREQ_SENT:
1433                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1434                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1435                         cm_node->listener, cm_node->state);
1436                 active_open_err(cm_node, skb, reset);
1437                 break;
1438         case NES_CM_STATE_MPAREQ_RCVD:
1439                 passive_state = atomic_add_return(1, &cm_node->passive_state);
1440                 if (passive_state ==  NES_SEND_RESET_EVENT)
1441                         create_event(cm_node, NES_CM_EVENT_RESET);
1442                 cm_node->state = NES_CM_STATE_CLOSED;
1443                 dev_kfree_skb_any(skb);
1444                 break;
1445         case NES_CM_STATE_ESTABLISHED:
1446         case NES_CM_STATE_SYN_RCVD:
1447         case NES_CM_STATE_LISTENING:
1448                 nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
1449                 passive_open_err(cm_node, skb, reset);
1450                 break;
1451         case NES_CM_STATE_TSA:
1452                 active_open_err(cm_node, skb, reset);
1453                 break;
1454         case NES_CM_STATE_CLOSED:
1455                 drop_packet(skb);
1456                 break;
1457         case NES_CM_STATE_FIN_WAIT1:
1458         case NES_CM_STATE_LAST_ACK:
1459                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1460         case NES_CM_STATE_TIME_WAIT:
1461                 cm_node->state = NES_CM_STATE_CLOSED;
1462                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1463                 drop_packet(skb);
1464                 break;
1465         default:
1466                 drop_packet(skb);
1467                 break;
1468         }
1469 }
1470
1471
1472 static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb)
1473 {
1474
1475         int     ret = 0;
1476         int datasize = skb->len;
1477         u8 *dataloc = skb->data;
1478
1479         enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN;
1480         u32     res_type;
1481         ret = parse_mpa(cm_node, dataloc, &res_type, datasize);
1482         if (ret) {
1483                 nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
1484                 if (cm_node->state == NES_CM_STATE_MPAREQ_SENT) {
1485                         nes_debug(NES_DBG_CM, "%s[%u] create abort for "
1486                                 "cm_node=%p listener=%p state=%d\n", __func__,
1487                                 __LINE__, cm_node, cm_node->listener,
1488                                 cm_node->state);
1489                         active_open_err(cm_node, skb, 1);
1490                 } else {
1491                         passive_open_err(cm_node, skb, 1);
1492                 }
1493                 return;
1494         }
1495
1496         switch (cm_node->state) {
1497         case NES_CM_STATE_ESTABLISHED:
1498                 if (res_type == NES_MPA_REQUEST_REJECT) {
1499                         /*BIG problem as we are receiving the MPA.. So should
1500                         * not be REJECT.. This is Passive Open.. We can
1501                         * only receive it Reject for Active Open...*/
1502                         WARN_ON(1);
1503                 }
1504                 cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
1505                 type = NES_CM_EVENT_MPA_REQ;
1506                 atomic_set(&cm_node->passive_state,
1507                                 NES_PASSIVE_STATE_INDICATED);
1508                 break;
1509         case NES_CM_STATE_MPAREQ_SENT:
1510                 cleanup_retrans_entry(cm_node);
1511                 if (res_type == NES_MPA_REQUEST_REJECT) {
1512                         type = NES_CM_EVENT_MPA_REJECT;
1513                         cm_node->state = NES_CM_STATE_MPAREJ_RCVD;
1514                 } else {
1515                         type = NES_CM_EVENT_CONNECTED;
1516                         cm_node->state = NES_CM_STATE_TSA;
1517                 }
1518
1519                 break;
1520         default:
1521                 WARN_ON(1);
1522                 break;
1523         }
1524         dev_kfree_skb_any(skb);
1525         create_event(cm_node, type);
1526 }
1527
1528 static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
1529 {
1530         switch (cm_node->state) {
1531         case NES_CM_STATE_SYN_SENT:
1532         case NES_CM_STATE_MPAREQ_SENT:
1533                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1534                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1535                         cm_node->listener, cm_node->state);
1536                 active_open_err(cm_node, skb, 1);
1537                 break;
1538         case NES_CM_STATE_ESTABLISHED:
1539         case NES_CM_STATE_SYN_RCVD:
1540                 passive_open_err(cm_node, skb, 1);
1541                 break;
1542         case NES_CM_STATE_TSA:
1543         default:
1544                 drop_packet(skb);
1545         }
1546 }
1547
1548 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1549         struct sk_buff *skb)
1550 {
1551         int err;
1552
1553         err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
1554         if (err)
1555                 active_open_err(cm_node, skb, 1);
1556
1557         return err;
1558 }
1559
1560 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1561         struct sk_buff *skb)
1562 {
1563         int err = 0;
1564         u32 seq;
1565         u32 ack_seq;
1566         u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
1567         u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
1568         u32 rcv_wnd;
1569         seq = ntohl(tcph->seq);
1570         ack_seq = ntohl(tcph->ack_seq);
1571         rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
1572         if (ack_seq != loc_seq_num)
1573                 err = 1;
1574         else if (!between(seq, rcv_nxt, (rcv_nxt+rcv_wnd)))
1575                 err = 1;
1576         if (err) {
1577                 nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
1578                         "listener=%p state=%d\n", __func__, __LINE__, cm_node,
1579                         cm_node->listener, cm_node->state);
1580                 indicate_pkt_err(cm_node, skb);
1581                 nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
1582                         "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
1583                         rcv_wnd);
1584         }
1585         return err;
1586 }
1587
1588 /*
1589  * handle_syn_pkt() is for Passive node. The syn packet is received when a node
1590  * is created with a listener or it may comein as rexmitted packet which in
1591  * that case will be just dropped.
1592  */
1593
1594 static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1595         struct tcphdr *tcph)
1596 {
1597         int ret;
1598         u32 inc_sequence;
1599         int optionsize;
1600
1601         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1602         skb_trim(skb, 0);
1603         inc_sequence = ntohl(tcph->seq);
1604
1605         switch (cm_node->state) {
1606         case NES_CM_STATE_SYN_SENT:
1607         case NES_CM_STATE_MPAREQ_SENT:
1608                 /* Rcvd syn on active open connection*/
1609                 active_open_err(cm_node, skb, 1);
1610                 break;
1611         case NES_CM_STATE_LISTENING:
1612                 /* Passive OPEN */
1613                 if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
1614                                 cm_node->listener->backlog) {
1615                         nes_debug(NES_DBG_CM, "drop syn due to backlog "
1616                                 "pressure \n");
1617                         cm_backlog_drops++;
1618                         passive_open_err(cm_node, skb, 0);
1619                         break;
1620                 }
1621                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
1622                         1);
1623                 if (ret) {
1624                         passive_open_err(cm_node, skb, 0);
1625                         /* drop pkt */
1626                         break;
1627                 }
1628                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1629                 BUG_ON(cm_node->send_entry);
1630                 cm_node->accept_pend = 1;
1631                 atomic_inc(&cm_node->listener->pend_accepts_cnt);
1632
1633                 cm_node->state = NES_CM_STATE_SYN_RCVD;
1634                 send_syn(cm_node, 1, skb);
1635                 break;
1636         case NES_CM_STATE_CLOSED:
1637                 cleanup_retrans_entry(cm_node);
1638                 add_ref_cm_node(cm_node);
1639                 send_reset(cm_node, skb);
1640                 break;
1641         case NES_CM_STATE_TSA:
1642         case NES_CM_STATE_ESTABLISHED:
1643         case NES_CM_STATE_FIN_WAIT1:
1644         case NES_CM_STATE_FIN_WAIT2:
1645         case NES_CM_STATE_MPAREQ_RCVD:
1646         case NES_CM_STATE_LAST_ACK:
1647         case NES_CM_STATE_CLOSING:
1648         case NES_CM_STATE_UNKNOWN:
1649         default:
1650                 drop_packet(skb);
1651                 break;
1652         }
1653 }
1654
1655 static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1656         struct tcphdr *tcph)
1657 {
1658
1659         int ret;
1660         u32 inc_sequence;
1661         int optionsize;
1662
1663         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1664         skb_trim(skb, 0);
1665         inc_sequence = ntohl(tcph->seq);
1666         switch (cm_node->state) {
1667         case NES_CM_STATE_SYN_SENT:
1668                 cleanup_retrans_entry(cm_node);
1669                 /* active open */
1670                 if (check_syn(cm_node, tcph, skb))
1671                         return;
1672                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1673                 /* setup options */
1674                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
1675                 if (ret) {
1676                         nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
1677                                 cm_node);
1678                         break;
1679                 }
1680                 cleanup_retrans_entry(cm_node);
1681                 cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
1682                 send_mpa_request(cm_node, skb);
1683                 cm_node->state = NES_CM_STATE_MPAREQ_SENT;
1684                 break;
1685         case NES_CM_STATE_MPAREQ_RCVD:
1686                 /* passive open, so should not be here */
1687                 passive_open_err(cm_node, skb, 1);
1688                 break;
1689         case NES_CM_STATE_LISTENING:
1690                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1691                 cleanup_retrans_entry(cm_node);
1692                 cm_node->state = NES_CM_STATE_CLOSED;
1693                 send_reset(cm_node, skb);
1694                 break;
1695         case NES_CM_STATE_CLOSED:
1696                 cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
1697                 cleanup_retrans_entry(cm_node);
1698                 add_ref_cm_node(cm_node);
1699                 send_reset(cm_node, skb);
1700                 break;
1701         case NES_CM_STATE_ESTABLISHED:
1702         case NES_CM_STATE_FIN_WAIT1:
1703         case NES_CM_STATE_FIN_WAIT2:
1704         case NES_CM_STATE_LAST_ACK:
1705         case NES_CM_STATE_TSA:
1706         case NES_CM_STATE_CLOSING:
1707         case NES_CM_STATE_UNKNOWN:
1708         case NES_CM_STATE_MPAREQ_SENT:
1709         default:
1710                 drop_packet(skb);
1711                 break;
1712         }
1713 }
1714
1715 static int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
1716         struct tcphdr *tcph)
1717 {
1718         int datasize = 0;
1719         u32 inc_sequence;
1720         u32 rem_seq_ack;
1721         u32 rem_seq;
1722         int ret = 0;
1723         int optionsize;
1724         optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
1725
1726         if (check_seq(cm_node, tcph, skb))
1727                 return -EINVAL;
1728
1729         skb_pull(skb, tcph->doff << 2);
1730         inc_sequence = ntohl(tcph->seq);
1731         rem_seq = ntohl(tcph->seq);
1732         rem_seq_ack =  ntohl(tcph->ack_seq);
1733         datasize = skb->len;
1734         switch (cm_node->state) {
1735         case NES_CM_STATE_SYN_RCVD:
1736                 /* Passive OPEN */
1737                 cleanup_retrans_entry(cm_node);
1738                 ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
1739                 if (ret)
1740                         break;
1741                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1742                 cm_node->state = NES_CM_STATE_ESTABLISHED;
1743                 if (datasize) {
1744                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1745                         handle_rcv_mpa(cm_node, skb);
1746                 } else  /* rcvd ACK only */
1747                         dev_kfree_skb_any(skb);
1748                 break;
1749         case NES_CM_STATE_ESTABLISHED:
1750                 /* Passive OPEN */
1751                 cleanup_retrans_entry(cm_node);
1752                 if (datasize) {
1753                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1754                         handle_rcv_mpa(cm_node, skb);
1755                 } else
1756                         drop_packet(skb);
1757                 break;
1758         case NES_CM_STATE_MPAREQ_SENT:
1759                 cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
1760                 if (datasize) {
1761                         cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
1762                         handle_rcv_mpa(cm_node, skb);
1763                 } else  /* Could be just an ack pkt.. */
1764                         dev_kfree_skb_any(skb);
1765                 break;
1766         case NES_CM_STATE_LISTENING:
1767                 cleanup_retrans_entry(cm_node);
1768                 cm_node->state = NES_CM_STATE_CLOSED;
1769                 send_reset(cm_node, skb);
1770                 break;
1771         case NES_CM_STATE_CLOSED:
1772                 cleanup_retrans_entry(cm_node);
1773                 add_ref_cm_node(cm_node);
1774                 send_reset(cm_node, skb);
1775                 break;
1776         case NES_CM_STATE_LAST_ACK:
1777         case NES_CM_STATE_CLOSING:
1778                 cleanup_retrans_entry(cm_node);
1779                 cm_node->state = NES_CM_STATE_CLOSED;
1780                 cm_node->cm_id->rem_ref(cm_node->cm_id);
1781                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1782                 drop_packet(skb);
1783                 break;
1784         case NES_CM_STATE_FIN_WAIT1:
1785                 cleanup_retrans_entry(cm_node);
1786                 drop_packet(skb);
1787                 cm_node->state = NES_CM_STATE_FIN_WAIT2;
1788                 break;
1789         case NES_CM_STATE_SYN_SENT:
1790         case NES_CM_STATE_FIN_WAIT2:
1791         case NES_CM_STATE_TSA:
1792         case NES_CM_STATE_MPAREQ_RCVD:
1793         case NES_CM_STATE_UNKNOWN:
1794         default:
1795                 cleanup_retrans_entry(cm_node);
1796                 drop_packet(skb);
1797                 break;
1798         }
1799         return ret;
1800 }
1801
1802
1803
1804 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
1805         struct sk_buff *skb, int optionsize, int passive)
1806 {
1807         u8 *optionsloc = (u8 *)&tcph[1];
1808         if (optionsize) {
1809                 if (process_options(cm_node, optionsloc, optionsize,
1810                         (u32)tcph->syn)) {
1811                         nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
1812                                 __func__, cm_node);
1813                         if (passive)
1814                                 passive_open_err(cm_node, skb, 1);
1815                         else
1816                                 active_open_err(cm_node, skb, 1);
1817                         return 1;
1818                 }
1819         }
1820
1821         cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
1822                         cm_node->tcp_cntxt.snd_wscale;
1823
1824         if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
1825                 cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
1826         return 0;
1827 }
1828
1829 /*
1830  * active_open_err() will send reset() if flag set..
1831  * It will also send ABORT event.
1832  */
1833
1834 static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1835         int reset)
1836 {
1837         cleanup_retrans_entry(cm_node);
1838         if (reset) {
1839                 nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
1840                                 "state=%d\n", cm_node, cm_node->state);
1841                 add_ref_cm_node(cm_node);
1842                 send_reset(cm_node, skb);
1843         } else
1844                 dev_kfree_skb_any(skb);
1845
1846         cm_node->state = NES_CM_STATE_CLOSED;
1847         create_event(cm_node, NES_CM_EVENT_ABORTED);
1848 }
1849
1850 /*
1851  * passive_open_err() will either do a reset() or will free up the skb and
1852  * remove the cm_node.
1853  */
1854
1855 static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
1856         int reset)
1857 {
1858         cleanup_retrans_entry(cm_node);
1859         cm_node->state = NES_CM_STATE_CLOSED;
1860         if (reset) {
1861                 nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
1862                         "cm_node=%p state =%d\n", cm_node, cm_node->state);
1863                 send_reset(cm_node, skb);
1864         } else {
1865                 dev_kfree_skb_any(skb);
1866                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1867         }
1868 }
1869
1870 /*
1871  * free_retrans_entry() routines assumes that the retrans_list_lock has
1872  * been acquired before calling.
1873  */
1874 static void free_retrans_entry(struct nes_cm_node *cm_node)
1875 {
1876         struct nes_timer_entry *send_entry;
1877         send_entry = cm_node->send_entry;
1878         if (send_entry) {
1879                 cm_node->send_entry = NULL;
1880                 dev_kfree_skb_any(send_entry->skb);
1881                 kfree(send_entry);
1882                 rem_ref_cm_node(cm_node->cm_core, cm_node);
1883         }
1884 }
1885
1886 static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
1887 {
1888         unsigned long flags;
1889
1890         spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
1891         free_retrans_entry(cm_node);
1892         spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
1893 }
1894
1895 /**
1896  * process_packet
1897  * Returns skb if to be freed, else it will return NULL if already used..
1898  */
1899 static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
1900         struct nes_cm_core *cm_core)
1901 {
1902         enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
1903         struct tcphdr *tcph = tcp_hdr(skb);
1904         u32     fin_set = 0;
1905         int ret = 0;
1906         skb_pull(skb, ip_hdr(skb)->ihl << 2);
1907
1908         nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
1909                 "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
1910                 tcph->ack, tcph->rst, tcph->fin);
1911
1912         if (tcph->rst)
1913                 pkt_type = NES_PKT_TYPE_RST;
1914         else if (tcph->syn) {
1915                 pkt_type = NES_PKT_TYPE_SYN;
1916                 if (tcph->ack)
1917                         pkt_type = NES_PKT_TYPE_SYNACK;
1918         } else if (tcph->ack)
1919                 pkt_type = NES_PKT_TYPE_ACK;
1920         if (tcph->fin)
1921                 fin_set = 1;
1922
1923         switch (pkt_type) {
1924         case NES_PKT_TYPE_SYN:
1925                 handle_syn_pkt(cm_node, skb, tcph);
1926                 break;
1927         case NES_PKT_TYPE_SYNACK:
1928                 handle_synack_pkt(cm_node, skb, tcph);
1929                 break;
1930         case NES_PKT_TYPE_ACK:
1931                 ret = handle_ack_pkt(cm_node, skb, tcph);
1932                 if (fin_set && !ret)
1933                         handle_fin_pkt(cm_node);
1934                 break;
1935         case NES_PKT_TYPE_RST:
1936                 handle_rst_pkt(cm_node, skb, tcph);
1937                 break;
1938         default:
1939                 if ((fin_set) && (!check_seq(cm_node, tcph, skb)))
1940                         handle_fin_pkt(cm_node);
1941                 drop_packet(skb);
1942                 break;
1943         }
1944 }
1945
1946 /**
1947  * mini_cm_listen - create a listen node with params
1948  */
1949 static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
1950         struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
1951 {
1952         struct nes_cm_listener *listener;
1953         unsigned long flags;
1954
1955         nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
1956                 cm_info->loc_addr, cm_info->loc_port);
1957
1958         /* cannot have multiple matching listeners */
1959         listener = find_listener(cm_core, htonl(cm_info->loc_addr),
1960                         htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
1961         if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
1962                 /* find automatically incs ref count ??? */
1963                 atomic_dec(&listener->ref_count);
1964                 nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
1965                 return NULL;
1966         }
1967
1968         if (!listener) {
1969                 /* create a CM listen node (1/2 node to compare incoming traffic to) */
1970                 listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
1971                 if (!listener) {
1972                         nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
1973                         return NULL;
1974                 }
1975
1976                 listener->loc_addr = htonl(cm_info->loc_addr);
1977                 listener->loc_port = htons(cm_info->loc_port);
1978                 listener->reused_node = 0;
1979
1980                 atomic_set(&listener->ref_count, 1);
1981         }
1982         /* pasive case */
1983         /* find already inc'ed the ref count */
1984         else {
1985                 listener->reused_node = 1;
1986         }
1987
1988         listener->cm_id = cm_info->cm_id;
1989         atomic_set(&listener->pend_accepts_cnt, 0);
1990         listener->cm_core = cm_core;
1991         listener->nesvnic = nesvnic;
1992         atomic_inc(&cm_core->node_cnt);
1993
1994         listener->conn_type = cm_info->conn_type;
1995         listener->backlog = cm_info->backlog;
1996         listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
1997
1998         if (!listener->reused_node) {
1999                 spin_lock_irqsave(&cm_core->listen_list_lock, flags);
2000                 list_add(&listener->list, &cm_core->listen_list.list);
2001                 spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
2002                 atomic_inc(&cm_core->listen_node_cnt);
2003         }
2004
2005         nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
2006                         " listener = %p, backlog = %d, cm_id = %p.\n",
2007                         cm_info->loc_addr, cm_info->loc_port,
2008                         listener, listener->backlog, listener->cm_id);
2009
2010         return listener;
2011 }
2012
2013
2014 /**
2015  * mini_cm_connect - make a connection node with params
2016  */
2017 static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
2018         struct nes_vnic *nesvnic, u16 private_data_len,
2019         void *private_data, struct nes_cm_info *cm_info)
2020 {
2021         int ret = 0;
2022         struct nes_cm_node *cm_node;
2023         struct nes_cm_listener *loopbackremotelistener;
2024         struct nes_cm_node *loopbackremotenode;
2025         struct nes_cm_info loopback_cm_info;
2026         u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
2027         struct ietf_mpa_frame *mpa_frame = NULL;
2028
2029         /* create a CM connection node */
2030         cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
2031         if (!cm_node)
2032                 return NULL;
2033         mpa_frame = &cm_node->mpa_frame;
2034         memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE);
2035         mpa_frame->flags = IETF_MPA_FLAGS_CRC;
2036         mpa_frame->rev =  IETF_MPA_VERSION;
2037         mpa_frame->priv_data_len = htons(private_data_len);
2038
2039         /* set our node side to client (active) side */
2040         cm_node->tcp_cntxt.client = 1;
2041         cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
2042
2043         if (cm_info->loc_addr == cm_info->rem_addr) {
2044                 loopbackremotelistener = find_listener(cm_core,
2045                                 ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
2046                                 NES_CM_LISTENER_ACTIVE_STATE);
2047                 if (loopbackremotelistener == NULL) {
2048                         create_event(cm_node, NES_CM_EVENT_ABORTED);
2049                 } else {
2050                         loopback_cm_info = *cm_info;
2051                         loopback_cm_info.loc_port = cm_info->rem_port;
2052                         loopback_cm_info.rem_port = cm_info->loc_port;
2053                         loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
2054                         loopbackremotenode = make_cm_node(cm_core, nesvnic,
2055                                 &loopback_cm_info, loopbackremotelistener);
2056                         if (!loopbackremotenode) {
2057                                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2058                                 return NULL;
2059                         }
2060                         atomic_inc(&cm_loopbacks);
2061                         loopbackremotenode->loopbackpartner = cm_node;
2062                         loopbackremotenode->tcp_cntxt.rcv_wscale =
2063                                 NES_CM_DEFAULT_RCV_WND_SCALE;
2064                         cm_node->loopbackpartner = loopbackremotenode;
2065                         memcpy(loopbackremotenode->mpa_frame_buf, private_data,
2066                                 private_data_len);
2067                         loopbackremotenode->mpa_frame_size = private_data_len;
2068
2069                         /* we are done handling this state. */
2070                         /* set node to a TSA state */
2071                         cm_node->state = NES_CM_STATE_TSA;
2072                         cm_node->tcp_cntxt.rcv_nxt =
2073                                 loopbackremotenode->tcp_cntxt.loc_seq_num;
2074                         loopbackremotenode->tcp_cntxt.rcv_nxt =
2075                                 cm_node->tcp_cntxt.loc_seq_num;
2076                         cm_node->tcp_cntxt.max_snd_wnd =
2077                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2078                         loopbackremotenode->tcp_cntxt.max_snd_wnd =
2079                                 cm_node->tcp_cntxt.rcv_wnd;
2080                         cm_node->tcp_cntxt.snd_wnd =
2081                                 loopbackremotenode->tcp_cntxt.rcv_wnd;
2082                         loopbackremotenode->tcp_cntxt.snd_wnd =
2083                                 cm_node->tcp_cntxt.rcv_wnd;
2084                         cm_node->tcp_cntxt.snd_wscale =
2085                                 loopbackremotenode->tcp_cntxt.rcv_wscale;
2086                         loopbackremotenode->tcp_cntxt.snd_wscale =
2087                                 cm_node->tcp_cntxt.rcv_wscale;
2088                         loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD;
2089                         create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
2090                 }
2091                 return cm_node;
2092         }
2093
2094         /* set our node side to client (active) side */
2095         cm_node->tcp_cntxt.client = 1;
2096         /* init our MPA frame ptr */
2097         memcpy(mpa_frame->priv_data, private_data, private_data_len);
2098
2099         cm_node->mpa_frame_size = mpa_frame_size;
2100
2101         /* send a syn and goto syn sent state */
2102         cm_node->state = NES_CM_STATE_SYN_SENT;
2103         ret = send_syn(cm_node, 0, NULL);
2104
2105         if (ret) {
2106                 /* error in sending the syn free up the cm_node struct */
2107                 nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
2108                         "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
2109                         cm_node->rem_addr, cm_node->rem_port, cm_node,
2110                         cm_node->cm_id);
2111                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2112                 cm_node = NULL;
2113         }
2114
2115         if (cm_node)
2116                 nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
2117                         "port=0x%04x, cm_node=%p, cm_id = %p.\n",
2118                         cm_node->rem_addr, cm_node->rem_port, cm_node,
2119                         cm_node->cm_id);
2120
2121         return cm_node;
2122 }
2123
2124
2125 /**
2126  * mini_cm_accept - accept a connection
2127  * This function is never called
2128  */
2129 static int mini_cm_accept(struct nes_cm_core *cm_core,
2130         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2131 {
2132         return 0;
2133 }
2134
2135
2136 /**
2137  * mini_cm_reject - reject and teardown a connection
2138  */
2139 static int mini_cm_reject(struct nes_cm_core *cm_core,
2140         struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
2141 {
2142         int ret = 0;
2143         int err = 0;
2144         int passive_state;
2145         struct nes_cm_event event;
2146         struct iw_cm_id *cm_id = cm_node->cm_id;
2147         struct nes_cm_node *loopback = cm_node->loopbackpartner;
2148
2149         nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
2150                 __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
2151
2152         if (cm_node->tcp_cntxt.client)
2153                 return ret;
2154         cleanup_retrans_entry(cm_node);
2155
2156         if (!loopback) {
2157                 passive_state = atomic_add_return(1, &cm_node->passive_state);
2158                 if (passive_state == NES_SEND_RESET_EVENT) {
2159                         cm_node->state = NES_CM_STATE_CLOSED;
2160                         rem_ref_cm_node(cm_core, cm_node);
2161                 } else {
2162                         if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2163                                 rem_ref_cm_node(cm_core, cm_node);
2164                         } else {
2165                                 ret = send_mpa_reject(cm_node);
2166                                 if (ret) {
2167                                         cm_node->state = NES_CM_STATE_CLOSED;
2168                                         err = send_reset(cm_node, NULL);
2169                                         if (err)
2170                                                 WARN_ON(1);
2171                                 } else
2172                                         cm_id->add_ref(cm_id);
2173                         }
2174                 }
2175         } else {
2176                 cm_node->cm_id = NULL;
2177                 if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) {
2178                         rem_ref_cm_node(cm_core, cm_node);
2179                         rem_ref_cm_node(cm_core, loopback);
2180                 } else {
2181                         event.cm_node = loopback;
2182                         event.cm_info.rem_addr = loopback->rem_addr;
2183                         event.cm_info.loc_addr = loopback->loc_addr;
2184                         event.cm_info.rem_port = loopback->rem_port;
2185                         event.cm_info.loc_port = loopback->loc_port;
2186                         event.cm_info.cm_id = loopback->cm_id;
2187                         cm_event_mpa_reject(&event);
2188                         rem_ref_cm_node(cm_core, cm_node);
2189                         loopback->state = NES_CM_STATE_CLOSING;
2190
2191                         cm_id = loopback->cm_id;
2192                         rem_ref_cm_node(cm_core, loopback);
2193                         cm_id->rem_ref(cm_id);
2194                 }
2195         }
2196
2197         return ret;
2198 }
2199
2200
2201 /**
2202  * mini_cm_close
2203  */
2204 static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
2205 {
2206         int ret = 0;
2207
2208         if (!cm_core || !cm_node)
2209                 return -EINVAL;
2210
2211         switch (cm_node->state) {
2212         case NES_CM_STATE_SYN_RCVD:
2213         case NES_CM_STATE_SYN_SENT:
2214         case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
2215         case NES_CM_STATE_ESTABLISHED:
2216         case NES_CM_STATE_ACCEPTING:
2217         case NES_CM_STATE_MPAREQ_SENT:
2218         case NES_CM_STATE_MPAREQ_RCVD:
2219                 cleanup_retrans_entry(cm_node);
2220                 send_reset(cm_node, NULL);
2221                 break;
2222         case NES_CM_STATE_CLOSE_WAIT:
2223                 cm_node->state = NES_CM_STATE_LAST_ACK;
2224                 send_fin(cm_node, NULL);
2225                 break;
2226         case NES_CM_STATE_FIN_WAIT1:
2227         case NES_CM_STATE_FIN_WAIT2:
2228         case NES_CM_STATE_LAST_ACK:
2229         case NES_CM_STATE_TIME_WAIT:
2230         case NES_CM_STATE_CLOSING:
2231                 ret = -1;
2232                 break;
2233         case NES_CM_STATE_LISTENING:
2234                 cleanup_retrans_entry(cm_node);
2235                 send_reset(cm_node, NULL);
2236                 break;
2237         case NES_CM_STATE_MPAREJ_RCVD:
2238         case NES_CM_STATE_UNKNOWN:
2239         case NES_CM_STATE_INITED:
2240         case NES_CM_STATE_CLOSED:
2241         case NES_CM_STATE_LISTENER_DESTROYED:
2242                 ret = rem_ref_cm_node(cm_core, cm_node);
2243                 break;
2244         case NES_CM_STATE_TSA:
2245                 if (cm_node->send_entry)
2246                         printk(KERN_ERR "ERROR Close got called from STATE_TSA "
2247                                 "send_entry=%p\n", cm_node->send_entry);
2248                 ret = rem_ref_cm_node(cm_core, cm_node);
2249                 break;
2250         }
2251         return ret;
2252 }
2253
2254
2255 /**
2256  * recv_pkt - recv an ETHERNET packet, and process it through CM
2257  * node state machine
2258  */
2259 static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
2260         struct nes_vnic *nesvnic, struct sk_buff *skb)
2261 {
2262         struct nes_cm_node *cm_node = NULL;
2263         struct nes_cm_listener *listener = NULL;
2264         struct iphdr *iph;
2265         struct tcphdr *tcph;
2266         struct nes_cm_info nfo;
2267         int skb_handled = 1;
2268         __be32 tmp_daddr, tmp_saddr;
2269
2270         if (!skb)
2271                 return 0;
2272         if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
2273                 return 0;
2274         }
2275
2276         iph = (struct iphdr *)skb->data;
2277         tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
2278
2279         nfo.loc_addr = ntohl(iph->daddr);
2280         nfo.loc_port = ntohs(tcph->dest);
2281         nfo.rem_addr = ntohl(iph->saddr);
2282         nfo.rem_port = ntohs(tcph->source);
2283
2284         tmp_daddr = cpu_to_be32(iph->daddr);
2285         tmp_saddr = cpu_to_be32(iph->saddr);
2286
2287         nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
2288                   &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
2289
2290         do {
2291                 cm_node = find_node(cm_core,
2292                         nfo.rem_port, nfo.rem_addr,
2293                         nfo.loc_port, nfo.loc_addr);
2294
2295                 if (!cm_node) {
2296                         /* Only type of packet accepted are for */
2297                         /* the PASSIVE open (syn only) */
2298                         if ((!tcph->syn) || (tcph->ack)) {
2299                                 skb_handled = 0;
2300                                 break;
2301                         }
2302                         listener = find_listener(cm_core, nfo.loc_addr,
2303                                 nfo.loc_port,
2304                                 NES_CM_LISTENER_ACTIVE_STATE);
2305                         if (!listener) {
2306                                 nfo.cm_id = NULL;
2307                                 nfo.conn_type = 0;
2308                                 nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
2309                                 skb_handled = 0;
2310                                 break;
2311                         }
2312                         nfo.cm_id = listener->cm_id;
2313                         nfo.conn_type = listener->conn_type;
2314                         cm_node = make_cm_node(cm_core, nesvnic, &nfo,
2315                                 listener);
2316                         if (!cm_node) {
2317                                 nes_debug(NES_DBG_CM, "Unable to allocate "
2318                                         "node\n");
2319                                 cm_packets_dropped++;
2320                                 atomic_dec(&listener->ref_count);
2321                                 dev_kfree_skb_any(skb);
2322                                 break;
2323                         }
2324                         if (!tcph->rst && !tcph->fin) {
2325                                 cm_node->state = NES_CM_STATE_LISTENING;
2326                         } else {
2327                                 cm_packets_dropped++;
2328                                 rem_ref_cm_node(cm_core, cm_node);
2329                                 dev_kfree_skb_any(skb);
2330                                 break;
2331                         }
2332                         add_ref_cm_node(cm_node);
2333                 } else if (cm_node->state == NES_CM_STATE_TSA) {
2334                         rem_ref_cm_node(cm_core, cm_node);
2335                         atomic_inc(&cm_accel_dropped_pkts);
2336                         dev_kfree_skb_any(skb);
2337                         break;
2338                 }
2339                 skb_reset_network_header(skb);
2340                 skb_set_transport_header(skb, sizeof(*tcph));
2341                 skb->len = ntohs(iph->tot_len);
2342                 process_packet(cm_node, skb, cm_core);
2343                 rem_ref_cm_node(cm_core, cm_node);
2344         } while (0);
2345         return skb_handled;
2346 }
2347
2348
2349 /**
2350  * nes_cm_alloc_core - allocate a top level instance of a cm core
2351  */
2352 static struct nes_cm_core *nes_cm_alloc_core(void)
2353 {
2354         struct nes_cm_core *cm_core;
2355
2356         /* setup the CM core */
2357         /* alloc top level core control structure */
2358         cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
2359         if (!cm_core)
2360                 return NULL;
2361
2362         INIT_LIST_HEAD(&cm_core->connected_nodes);
2363         init_timer(&cm_core->tcp_timer);
2364         cm_core->tcp_timer.function = nes_cm_timer_tick;
2365
2366         cm_core->mtu   = NES_CM_DEFAULT_MTU;
2367         cm_core->state = NES_CM_STATE_INITED;
2368         cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
2369
2370         atomic_set(&cm_core->events_posted, 0);
2371
2372         cm_core->api = &nes_cm_api;
2373
2374         spin_lock_init(&cm_core->ht_lock);
2375         spin_lock_init(&cm_core->listen_list_lock);
2376
2377         INIT_LIST_HEAD(&cm_core->listen_list.list);
2378
2379         nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
2380
2381         nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
2382         cm_core->event_wq = create_singlethread_workqueue("nesewq");
2383         cm_core->post_event = nes_cm_post_event;
2384         nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
2385         cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
2386
2387         print_core(cm_core);
2388         return cm_core;
2389 }
2390
2391
2392 /**
2393  * mini_cm_dealloc_core - deallocate a top level instance of a cm core
2394  */
2395 static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
2396 {
2397         nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
2398
2399         if (!cm_core)
2400                 return -EINVAL;
2401
2402         barrier();
2403
2404         if (timer_pending(&cm_core->tcp_timer)) {
2405                 del_timer(&cm_core->tcp_timer);
2406         }
2407
2408         destroy_workqueue(cm_core->event_wq);
2409         destroy_workqueue(cm_core->disconn_wq);
2410         nes_debug(NES_DBG_CM, "\n");
2411         kfree(cm_core);
2412
2413         return 0;
2414 }
2415
2416
2417 /**
2418  * mini_cm_get
2419  */
2420 static int mini_cm_get(struct nes_cm_core *cm_core)
2421 {
2422         return cm_core->state;
2423 }
2424
2425
2426 /**
2427  * mini_cm_set
2428  */
2429 static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
2430 {
2431         int ret = 0;
2432
2433         switch (type) {
2434         case NES_CM_SET_PKT_SIZE:
2435                 cm_core->mtu = value;
2436                 break;
2437         case NES_CM_SET_FREE_PKT_Q_SIZE:
2438                 cm_core->free_tx_pkt_max = value;
2439                 break;
2440         default:
2441                 /* unknown set option */
2442                 ret = -EINVAL;
2443         }
2444
2445         return ret;
2446 }
2447
2448
2449 /**
2450  * nes_cm_init_tsa_conn setup HW; MPA frames must be
2451  * successfully exchanged when this is called
2452  */
2453 static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
2454 {
2455         int ret = 0;
2456
2457         if (!nesqp)
2458                 return -EINVAL;
2459
2460         nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
2461                         NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
2462                         NES_QPCONTEXT_MISC_DROS);
2463
2464         if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
2465                 nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
2466
2467         nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
2468
2469         nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
2470
2471         nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
2472                         (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
2473
2474         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2475                         (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
2476                         NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
2477
2478         nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
2479                         (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
2480                         NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
2481
2482         nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
2483         nesqp->nesqp_context->ts_recent = 0;
2484         nesqp->nesqp_context->ts_age = 0;
2485         nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2486         nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
2487         nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2488         nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
2489                         cm_node->tcp_cntxt.rcv_wscale);
2490         nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2491         nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2492         nesqp->nesqp_context->srtt = 0;
2493         nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
2494         nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
2495         nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
2496         nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
2497         nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
2498         nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
2499
2500         nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
2501                         " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
2502                         nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2503                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2504                         cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
2505                         le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
2506                         le32_to_cpu(nesqp->nesqp_context->misc));
2507         nes_debug(NES_DBG_CM, "  snd_wnd  = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
2508         nes_debug(NES_DBG_CM, "  snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
2509         nes_debug(NES_DBG_CM, "  max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
2510
2511         nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
2512         cm_node->state = NES_CM_STATE_TSA;
2513
2514         return ret;
2515 }
2516
2517
2518 /**
2519  * nes_cm_disconn
2520  */
2521 int nes_cm_disconn(struct nes_qp *nesqp)
2522 {
2523         struct disconn_work *work;
2524
2525         work = kzalloc(sizeof *work, GFP_ATOMIC);
2526         if (!work)
2527                 return -ENOMEM; /* Timer will clean up */
2528
2529         nes_add_ref(&nesqp->ibqp);
2530         work->nesqp = nesqp;
2531         INIT_WORK(&work->work, nes_disconnect_worker);
2532         queue_work(g_cm_core->disconn_wq, &work->work);
2533         return 0;
2534 }
2535
2536
2537 /**
2538  * nes_disconnect_worker
2539  */
2540 static void nes_disconnect_worker(struct work_struct *work)
2541 {
2542         struct disconn_work *dwork = container_of(work, struct disconn_work, work);
2543         struct nes_qp *nesqp = dwork->nesqp;
2544
2545         kfree(dwork);
2546         nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
2547                         nesqp->last_aeq, nesqp->hwqp.qp_id);
2548         nes_cm_disconn_true(nesqp);
2549         nes_rem_ref(&nesqp->ibqp);
2550 }
2551
2552
2553 /**
2554  * nes_cm_disconn_true
2555  */
2556 static int nes_cm_disconn_true(struct nes_qp *nesqp)
2557 {
2558         unsigned long flags;
2559         int ret = 0;
2560         struct iw_cm_id *cm_id;
2561         struct iw_cm_event cm_event;
2562         struct nes_vnic *nesvnic;
2563         u16 last_ae;
2564         u8 original_hw_tcp_state;
2565         u8 original_ibqp_state;
2566         enum iw_cm_event_type disconn_status = IW_CM_EVENT_STATUS_OK;
2567         int issue_disconn = 0;
2568         int issue_close = 0;
2569         int issue_flush = 0;
2570         u32 flush_q = NES_CQP_FLUSH_RQ;
2571         struct ib_event ibevent;
2572
2573         if (!nesqp) {
2574                 nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
2575                 return -1;
2576         }
2577
2578         spin_lock_irqsave(&nesqp->lock, flags);
2579         cm_id = nesqp->cm_id;
2580         /* make sure we havent already closed this connection */
2581         if (!cm_id) {
2582                 nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
2583                                 nesqp->hwqp.qp_id);
2584                 spin_unlock_irqrestore(&nesqp->lock, flags);
2585                 return -1;
2586         }
2587
2588         nesvnic = to_nesvnic(nesqp->ibqp.device);
2589         nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
2590
2591         original_hw_tcp_state = nesqp->hw_tcp_state;
2592         original_ibqp_state   = nesqp->ibqp_state;
2593         last_ae = nesqp->last_aeq;
2594
2595         if (nesqp->term_flags) {
2596                 issue_disconn = 1;
2597                 issue_close = 1;
2598                 nesqp->cm_id = NULL;
2599                 if (nesqp->flush_issued == 0) {
2600                         nesqp->flush_issued = 1;
2601                         issue_flush = 1;
2602                 }
2603         } else if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
2604                         ((original_ibqp_state == IB_QPS_RTS) &&
2605                         (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2606                 issue_disconn = 1;
2607                 if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET)
2608                         disconn_status = IW_CM_EVENT_STATUS_RESET;
2609         }
2610
2611         if (((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
2612                  (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
2613                  (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
2614                  (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
2615                 issue_close = 1;
2616                 nesqp->cm_id = NULL;
2617                 if (nesqp->flush_issued == 0) {
2618                         nesqp->flush_issued = 1;
2619                         issue_flush = 1;
2620                 }
2621         }
2622
2623         spin_unlock_irqrestore(&nesqp->lock, flags);
2624
2625         if ((issue_flush) && (nesqp->destroyed == 0)) {
2626                 /* Flush the queue(s) */
2627                 if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE)
2628                         flush_q |= NES_CQP_FLUSH_SQ;
2629                 flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1);
2630
2631                 if (nesqp->term_flags) {
2632                         ibevent.device = nesqp->ibqp.device;
2633                         ibevent.event = nesqp->terminate_eventtype;
2634                         ibevent.element.qp = &nesqp->ibqp;
2635                         nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context);
2636                 }
2637         }
2638
2639         if ((cm_id) && (cm_id->event_handler)) {
2640                 if (issue_disconn) {
2641                         atomic_inc(&cm_disconnects);
2642                         cm_event.event = IW_CM_EVENT_DISCONNECT;
2643                         cm_event.status = disconn_status;
2644                         cm_event.local_addr = cm_id->local_addr;
2645                         cm_event.remote_addr = cm_id->remote_addr;
2646                         cm_event.private_data = NULL;
2647                         cm_event.private_data_len = 0;
2648
2649                         nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
2650                                 " for  QP%u, SQ Head = %u, SQ Tail = %u. "
2651                                 "cm_id = %p, refcount = %u.\n",
2652                                 nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
2653                                 nesqp->hwqp.sq_tail, cm_id,
2654                                 atomic_read(&nesqp->refcount));
2655
2656                         ret = cm_id->event_handler(cm_id, &cm_event);
2657                         if (ret)
2658                                 nes_debug(NES_DBG_CM, "OFA CM event_handler "
2659                                         "returned, ret=%d\n", ret);
2660                 }
2661
2662                 if (issue_close) {
2663                         atomic_inc(&cm_closes);
2664                         nes_disconnect(nesqp, 1);
2665
2666                         cm_id->provider_data = nesqp;
2667                         /* Send up the close complete event */
2668                         cm_event.event = IW_CM_EVENT_CLOSE;
2669                         cm_event.status = IW_CM_EVENT_STATUS_OK;
2670                         cm_event.provider_data = cm_id->provider_data;
2671                         cm_event.local_addr = cm_id->local_addr;
2672                         cm_event.remote_addr = cm_id->remote_addr;
2673                         cm_event.private_data = NULL;
2674                         cm_event.private_data_len = 0;
2675
2676                         ret = cm_id->event_handler(cm_id, &cm_event);
2677                         if (ret) {
2678                                 nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
2679                         }
2680
2681                         cm_id->rem_ref(cm_id);
2682                 }
2683         }
2684
2685         return 0;
2686 }
2687
2688
2689 /**
2690  * nes_disconnect
2691  */
2692 static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
2693 {
2694         int ret = 0;
2695         struct nes_vnic *nesvnic;
2696         struct nes_device *nesdev;
2697         struct nes_ib_device *nesibdev;
2698
2699         nesvnic = to_nesvnic(nesqp->ibqp.device);
2700         if (!nesvnic)
2701                 return -EINVAL;
2702
2703         nesdev = nesvnic->nesdev;
2704         nesibdev = nesvnic->nesibdev;
2705
2706         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2707                         atomic_read(&nesvnic->netdev->refcnt));
2708
2709         if (nesqp->active_conn) {
2710
2711                 /* indicate this connection is NOT active */
2712                 nesqp->active_conn = 0;
2713         } else {
2714                 /* Need to free the Last Streaming Mode Message */
2715                 if (nesqp->ietf_frame) {
2716                         if (nesqp->lsmm_mr)
2717                                 nesibdev->ibdev.dereg_mr(nesqp->lsmm_mr);
2718                         pci_free_consistent(nesdev->pcidev,
2719                                         nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2720                                         nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2721                 }
2722         }
2723
2724         /* close the CM node down if it is still active */
2725         if (nesqp->cm_node) {
2726                 nes_debug(NES_DBG_CM, "Call close API\n");
2727
2728                 g_cm_core->api->close(g_cm_core, nesqp->cm_node);
2729         }
2730
2731         return ret;
2732 }
2733
2734
2735 /**
2736  * nes_accept
2737  */
2738 int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
2739 {
2740         u64 u64temp;
2741         struct ib_qp *ibqp;
2742         struct nes_qp *nesqp;
2743         struct nes_vnic *nesvnic;
2744         struct nes_device *nesdev;
2745         struct nes_cm_node *cm_node;
2746         struct nes_adapter *adapter;
2747         struct ib_qp_attr attr;
2748         struct iw_cm_event cm_event;
2749         struct nes_hw_qp_wqe *wqe;
2750         struct nes_v4_quad nes_quad;
2751         u32 crc_value;
2752         int ret;
2753         int passive_state;
2754         struct nes_ib_device *nesibdev;
2755         struct ib_mr *ibmr = NULL;
2756         struct ib_phys_buf ibphysbuf;
2757         struct nes_pd *nespd;
2758         u64 tagged_offset;
2759
2760         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
2761         if (!ibqp)
2762                 return -EINVAL;
2763
2764         /* get all our handles */
2765         nesqp = to_nesqp(ibqp);
2766         nesvnic = to_nesvnic(nesqp->ibqp.device);
2767         nesdev = nesvnic->nesdev;
2768         adapter = nesdev->nesadapter;
2769
2770         cm_node = (struct nes_cm_node *)cm_id->provider_data;
2771         nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
2772                 "%s\n", cm_node, nesvnic, nesvnic->netdev,
2773                 nesvnic->netdev->name);
2774
2775         if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) {
2776                 if (cm_node->loopbackpartner)
2777                         rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner);
2778                 rem_ref_cm_node(cm_node->cm_core, cm_node);
2779                 return -EINVAL;
2780         }
2781
2782         /* associate the node with the QP */
2783         nesqp->cm_node = (void *)cm_node;
2784         cm_node->nesqp = nesqp;
2785
2786         nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
2787                 nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
2788         atomic_inc(&cm_accepts);
2789
2790         nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
2791                         atomic_read(&nesvnic->netdev->refcnt));
2792
2793         /* allocate the ietf frame and space for private data */
2794         nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
2795                 sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
2796                 &nesqp->ietf_frame_pbase);
2797
2798         if (!nesqp->ietf_frame) {
2799                 nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
2800                         "data\n");
2801                 return -ENOMEM;
2802         }
2803
2804
2805         /* setup the MPA frame */
2806         nesqp->private_data_len = conn_param->private_data_len;
2807         memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
2808
2809         memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
2810                         conn_param->private_data_len);
2811
2812         nesqp->ietf_frame->priv_data_len =
2813                 cpu_to_be16(conn_param->private_data_len);
2814         nesqp->ietf_frame->rev = mpa_version;
2815         nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
2816
2817         /* setup our first outgoing iWarp send WQE (the IETF frame response) */
2818         wqe = &nesqp->hwqp.sq_vbase[0];
2819
2820         if (cm_id->remote_addr.sin_addr.s_addr !=
2821                         cm_id->local_addr.sin_addr.s_addr) {
2822                 u64temp = (unsigned long)nesqp;
2823                 nesibdev = nesvnic->nesibdev;
2824                 nespd = nesqp->nespd;
2825                 ibphysbuf.addr = nesqp->ietf_frame_pbase;
2826                 ibphysbuf.size = conn_param->private_data_len +
2827                                         sizeof(struct ietf_mpa_frame);
2828                 tagged_offset = (u64)(unsigned long)nesqp->ietf_frame;
2829                 ibmr = nesibdev->ibdev.reg_phys_mr((struct ib_pd *)nespd,
2830                                                 &ibphysbuf, 1,
2831                                                 IB_ACCESS_LOCAL_WRITE,
2832                                                 &tagged_offset);
2833                 if (!ibmr) {
2834                         nes_debug(NES_DBG_CM, "Unable to register memory region"
2835                                         "for lSMM for cm_node = %p \n",
2836                                         cm_node);
2837                         pci_free_consistent(nesdev->pcidev,
2838                                 nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
2839                                 nesqp->ietf_frame, nesqp->ietf_frame_pbase);
2840                         return -ENOMEM;
2841                 }
2842
2843                 ibmr->pd = &nespd->ibpd;
2844                 ibmr->device = nespd->ibpd.device;
2845                 nesqp->lsmm_mr = ibmr;
2846
2847                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
2848                 set_wqe_64bit_value(wqe->wqe_words,
2849                         NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
2850                         u64temp);
2851                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
2852                         cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
2853                         NES_IWARP_SQ_WQE_WRPDU);
2854                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
2855                         cpu_to_le32(conn_param->private_data_len +
2856                         sizeof(struct ietf_mpa_frame));
2857                 set_wqe_64bit_value(wqe->wqe_words,
2858                                         NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
2859                                         (u64)(unsigned long)nesqp->ietf_frame);
2860                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
2861                         cpu_to_le32(conn_param->private_data_len +
2862                         sizeof(struct ietf_mpa_frame));
2863                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
2864                 if (nesqp->sq_kmapped) {
2865                         nesqp->sq_kmapped = 0;
2866                         kunmap(nesqp->page);
2867                 }
2868
2869                 nesqp->nesqp_context->ird_ord_sizes |=
2870                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
2871                         NES_QPCONTEXT_ORDIRD_WRPDU);
2872         } else {
2873                 nesqp->nesqp_context->ird_ord_sizes |=
2874                         cpu_to_le32(NES_QPCONTEXT_ORDIRD_WRPDU);
2875         }
2876         nesqp->skip_lsmm = 1;
2877
2878
2879         /* Cache the cm_id in the qp */
2880         nesqp->cm_id = cm_id;
2881         cm_node->cm_id = cm_id;
2882
2883         /*  nesqp->cm_node = (void *)cm_id->provider_data; */
2884         cm_id->provider_data = nesqp;
2885         nesqp->active_conn   = 0;
2886
2887         if (cm_node->state == NES_CM_STATE_TSA)
2888                 nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
2889                         cm_node);
2890
2891         nes_cm_init_tsa_conn(nesqp, cm_node);
2892
2893         nesqp->nesqp_context->tcpPorts[0] =
2894                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
2895         nesqp->nesqp_context->tcpPorts[1] =
2896                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
2897
2898         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2899                 nesqp->nesqp_context->ip0 =
2900                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
2901         else
2902                 nesqp->nesqp_context->ip0 =
2903                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
2904
2905         nesqp->nesqp_context->misc2 |= cpu_to_le32(
2906                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
2907                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
2908
2909         nesqp->nesqp_context->arp_index_vlan |=
2910                 cpu_to_le32(nes_arp_table(nesdev,
2911                         le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
2912                         NES_ARP_RESOLVE) << 16);
2913
2914         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
2915                 jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
2916
2917         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
2918
2919         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
2920                 ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
2921         nesqp->nesqp_context->ird_ord_sizes |=
2922                 cpu_to_le32((u32)conn_param->ord);
2923
2924         memset(&nes_quad, 0, sizeof(nes_quad));
2925         nes_quad.DstIpAdrIndex =
2926                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
2927         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
2928                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
2929         else
2930                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
2931         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
2932         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
2933
2934         /* Produce hash key */
2935         crc_value = get_crc_value(&nes_quad);
2936         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
2937         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
2938                 nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
2939
2940         nesqp->hte_index &= adapter->hte_index_mask;
2941         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
2942
2943         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
2944
2945         nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
2946                         "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
2947                         "private data length=%zu.\n", nesqp->hwqp.qp_id,
2948                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
2949                         ntohs(cm_id->remote_addr.sin_port),
2950                         ntohl(cm_id->local_addr.sin_addr.s_addr),
2951                         ntohs(cm_id->local_addr.sin_port),
2952                         le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
2953                         le32_to_cpu(nesqp->nesqp_context->snd_nxt),
2954                         conn_param->private_data_len +
2955                         sizeof(struct ietf_mpa_frame));
2956
2957
2958         /* notify OF layer that accept event was successful */
2959         cm_id->add_ref(cm_id);
2960         nes_add_ref(&nesqp->ibqp);
2961
2962         cm_event.event = IW_CM_EVENT_ESTABLISHED;
2963         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
2964         cm_event.provider_data = (void *)nesqp;
2965         cm_event.local_addr = cm_id->local_addr;
2966         cm_event.remote_addr = cm_id->remote_addr;
2967         cm_event.private_data = NULL;
2968         cm_event.private_data_len = 0;
2969         ret = cm_id->event_handler(cm_id, &cm_event);
2970         attr.qp_state = IB_QPS_RTS;
2971         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
2972         if (cm_node->loopbackpartner) {
2973                 cm_node->loopbackpartner->mpa_frame_size =
2974                         nesqp->private_data_len;
2975                 /* copy entire MPA frame to our cm_node's frame */
2976                 memcpy(cm_node->loopbackpartner->mpa_frame_buf,
2977                         nesqp->ietf_frame->priv_data, nesqp->private_data_len);
2978                 create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
2979         }
2980         if (ret)
2981                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
2982                         "ret=%d\n", __func__, __LINE__, ret);
2983
2984         passive_state = atomic_add_return(1, &cm_node->passive_state);
2985         if (passive_state == NES_SEND_RESET_EVENT)
2986                 create_event(cm_node, NES_CM_EVENT_RESET);
2987         return 0;
2988 }
2989
2990
2991 /**
2992  * nes_reject
2993  */
2994 int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
2995 {
2996         struct nes_cm_node *cm_node;
2997         struct nes_cm_node *loopback;
2998
2999         struct nes_cm_core *cm_core;
3000
3001         atomic_inc(&cm_rejects);
3002         cm_node = (struct nes_cm_node *) cm_id->provider_data;
3003         loopback = cm_node->loopbackpartner;
3004         cm_core = cm_node->cm_core;
3005         cm_node->cm_id = cm_id;
3006         cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
3007
3008         if (cm_node->mpa_frame_size > MAX_CM_BUFFER)
3009                 return -EINVAL;
3010
3011         memcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
3012         if (loopback) {
3013                 memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len);
3014                 loopback->mpa_frame.priv_data_len = pdata_len;
3015                 loopback->mpa_frame_size = sizeof(struct ietf_mpa_frame) +
3016                                 pdata_len;
3017         } else {
3018                 memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
3019                 cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
3020         }
3021
3022         cm_node->mpa_frame.rev = mpa_version;
3023         cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
3024
3025         return cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
3026 }
3027
3028
3029 /**
3030  * nes_connect
3031  * setup and launch cm connect node
3032  */
3033 int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
3034 {
3035         struct ib_qp *ibqp;
3036         struct nes_qp *nesqp;
3037         struct nes_vnic *nesvnic;
3038         struct nes_device *nesdev;
3039         struct nes_cm_node *cm_node;
3040         struct nes_cm_info cm_info;
3041         int apbvt_set = 0;
3042
3043         ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
3044         if (!ibqp)
3045                 return -EINVAL;
3046         nesqp = to_nesqp(ibqp);
3047         if (!nesqp)
3048                 return -EINVAL;
3049         nesvnic = to_nesvnic(nesqp->ibqp.device);
3050         if (!nesvnic)
3051                 return -EINVAL;
3052         nesdev  = nesvnic->nesdev;
3053         if (!nesdev)
3054                 return -EINVAL;
3055
3056         if (!(cm_id->local_addr.sin_port) || !(cm_id->remote_addr.sin_port))
3057                 return -EINVAL;
3058
3059         nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
3060                 "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
3061                 ntohl(nesvnic->local_ipaddr),
3062                 ntohl(cm_id->remote_addr.sin_addr.s_addr),
3063                 ntohs(cm_id->remote_addr.sin_port),
3064                 ntohl(cm_id->local_addr.sin_addr.s_addr),
3065                 ntohs(cm_id->local_addr.sin_port));
3066
3067         atomic_inc(&cm_connects);
3068         nesqp->active_conn = 1;
3069
3070         /* cache the cm_id in the qp */
3071         nesqp->cm_id = cm_id;
3072
3073         cm_id->provider_data = nesqp;
3074
3075         nesqp->private_data_len = conn_param->private_data_len;
3076         nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
3077         nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
3078         nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
3079                 conn_param->private_data_len);
3080
3081         if (cm_id->local_addr.sin_addr.s_addr !=
3082                 cm_id->remote_addr.sin_addr.s_addr) {
3083                 nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3084                         PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
3085                 apbvt_set = 1;
3086         }
3087
3088         /* set up the connection params for the node */
3089         cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
3090         cm_info.loc_port = htons(cm_id->local_addr.sin_port);
3091         cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
3092         cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
3093         cm_info.cm_id = cm_id;
3094         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3095
3096         cm_id->add_ref(cm_id);
3097
3098         /* create a connect CM node connection */
3099         cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
3100                 conn_param->private_data_len, (void *)conn_param->private_data,
3101                 &cm_info);
3102         if (!cm_node) {
3103                 if (apbvt_set)
3104                         nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
3105                                 PCI_FUNC(nesdev->pcidev->devfn),
3106                                 NES_MANAGE_APBVT_DEL);
3107
3108                 cm_id->rem_ref(cm_id);
3109                 return -ENOMEM;
3110         }
3111
3112         cm_node->apbvt_set = apbvt_set;
3113         nesqp->cm_node = cm_node;
3114         cm_node->nesqp = nesqp;
3115         nes_add_ref(&nesqp->ibqp);
3116
3117         return 0;
3118 }
3119
3120
3121 /**
3122  * nes_create_listen
3123  */
3124 int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
3125 {
3126         struct nes_vnic *nesvnic;
3127         struct nes_cm_listener *cm_node;
3128         struct nes_cm_info cm_info;
3129         struct nes_adapter *adapter;
3130         int err;
3131
3132
3133         nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
3134                         cm_id, ntohs(cm_id->local_addr.sin_port));
3135
3136         nesvnic = to_nesvnic(cm_id->device);
3137         if (!nesvnic)
3138                 return -EINVAL;
3139         adapter = nesvnic->nesdev->nesadapter;
3140         nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
3141                         nesvnic, nesvnic->netdev, nesvnic->netdev->name);
3142
3143         nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
3144                         nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
3145
3146         /* setup listen params in our api call struct */
3147         cm_info.loc_addr = nesvnic->local_ipaddr;
3148         cm_info.loc_port = cm_id->local_addr.sin_port;
3149         cm_info.backlog = backlog;
3150         cm_info.cm_id = cm_id;
3151
3152         cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
3153
3154
3155         cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
3156         if (!cm_node) {
3157                 printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
3158                                 __func__, __LINE__);
3159                 return -ENOMEM;
3160         }
3161
3162         cm_id->provider_data = cm_node;
3163
3164         if (!cm_node->reused_node) {
3165                 err = nes_manage_apbvt(nesvnic,
3166                         ntohs(cm_id->local_addr.sin_port),
3167                         PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
3168                         NES_MANAGE_APBVT_ADD);
3169                 if (err) {
3170                         printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
3171                                 err);
3172                         g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
3173                         return err;
3174                 }
3175                 cm_listens_created++;
3176         }
3177
3178         cm_id->add_ref(cm_id);
3179         cm_id->provider_data = (void *)cm_node;
3180
3181
3182         return 0;
3183 }
3184
3185
3186 /**
3187  * nes_destroy_listen
3188  */
3189 int nes_destroy_listen(struct iw_cm_id *cm_id)
3190 {
3191         if (cm_id->provider_data)
3192                 g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
3193         else
3194                 nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
3195
3196         cm_id->rem_ref(cm_id);
3197
3198         return 0;
3199 }
3200
3201
3202 /**
3203  * nes_cm_recv
3204  */
3205 int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
3206 {
3207         int rc = 0;
3208         cm_packets_received++;
3209         if ((g_cm_core) && (g_cm_core->api)) {
3210                 rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
3211         } else {
3212                 nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
3213                                 " cm is not setup properly.\n");
3214         }
3215
3216         return rc;
3217 }
3218
3219
3220 /**
3221  * nes_cm_start
3222  * Start and init a cm core module
3223  */
3224 int nes_cm_start(void)
3225 {
3226         nes_debug(NES_DBG_CM, "\n");
3227         /* create the primary CM core, pass this handle to subsequent core inits */
3228         g_cm_core = nes_cm_alloc_core();
3229         if (g_cm_core) {
3230                 return 0;
3231         } else {
3232                 return -ENOMEM;
3233         }
3234 }
3235
3236
3237 /**
3238  * nes_cm_stop
3239  * stop and dealloc all cm core instances
3240  */
3241 int nes_cm_stop(void)
3242 {
3243         g_cm_core->api->destroy_cm_core(g_cm_core);
3244         return 0;
3245 }
3246
3247
3248 /**
3249  * cm_event_connected
3250  * handle a connected event, setup QPs and HW
3251  */
3252 static void cm_event_connected(struct nes_cm_event *event)
3253 {
3254         u64 u64temp;
3255         struct nes_qp *nesqp;
3256         struct nes_vnic *nesvnic;
3257         struct nes_device *nesdev;
3258         struct nes_cm_node *cm_node;
3259         struct nes_adapter *nesadapter;
3260         struct ib_qp_attr attr;
3261         struct iw_cm_id *cm_id;
3262         struct iw_cm_event cm_event;
3263         struct nes_hw_qp_wqe *wqe;
3264         struct nes_v4_quad nes_quad;
3265         u32 crc_value;
3266         int ret;
3267
3268         /* get all our handles */
3269         cm_node = event->cm_node;
3270         cm_id = cm_node->cm_id;
3271         nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
3272         nesqp = (struct nes_qp *)cm_id->provider_data;
3273         nesvnic = to_nesvnic(nesqp->ibqp.device);
3274         nesdev = nesvnic->nesdev;
3275         nesadapter = nesdev->nesadapter;
3276
3277         if (nesqp->destroyed) {
3278                 return;
3279         }
3280         atomic_inc(&cm_connecteds);
3281         nes_debug(NES_DBG_CM, "QP%u attempting to connect to  0x%08X:0x%04X on"
3282                         " local port 0x%04X. jiffies = %lu.\n",
3283                         nesqp->hwqp.qp_id,
3284                         ntohl(cm_id->remote_addr.sin_addr.s_addr),
3285                         ntohs(cm_id->remote_addr.sin_port),
3286                         ntohs(cm_id->local_addr.sin_port),
3287                         jiffies);
3288
3289         nes_cm_init_tsa_conn(nesqp, cm_node);
3290
3291         /* set the QP tsa context */
3292         nesqp->nesqp_context->tcpPorts[0] =
3293                 cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
3294         nesqp->nesqp_context->tcpPorts[1] =
3295                 cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
3296         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3297                 nesqp->nesqp_context->ip0 =
3298                         cpu_to_le32(ntohl(nesvnic->local_ipaddr));
3299         else
3300                 nesqp->nesqp_context->ip0 =
3301                         cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
3302
3303         nesqp->nesqp_context->misc2 |= cpu_to_le32(
3304                         (u32)PCI_FUNC(nesdev->pcidev->devfn) <<
3305                         NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
3306         nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
3307                         nes_arp_table(nesdev,
3308                         le32_to_cpu(nesqp->nesqp_context->ip0),
3309                         NULL, NES_ARP_RESOLVE) << 16);
3310         nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
3311                         jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
3312         nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
3313         nesqp->nesqp_context->ird_ord_sizes |=
3314                         cpu_to_le32((u32)1 <<
3315                         NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
3316
3317         /* Adjust tail for not having a LSMM */
3318         nesqp->hwqp.sq_tail = 1;
3319
3320 #if defined(NES_SEND_FIRST_WRITE)
3321         if (cm_node->send_write0) {
3322                 nes_debug(NES_DBG_CM, "Sending first write.\n");
3323                 wqe = &nesqp->hwqp.sq_vbase[0];
3324                 u64temp = (unsigned long)nesqp;
3325                 u64temp |= NES_SW_CONTEXT_ALIGN>>1;
3326                 set_wqe_64bit_value(wqe->wqe_words,
3327                                 NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
3328                 wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
3329                         cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
3330                 wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
3331                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
3332                 wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
3333                 wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
3334                 wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
3335
3336                 if (nesqp->sq_kmapped) {
3337                         nesqp->sq_kmapped = 0;
3338                         kunmap(nesqp->page);
3339                 }
3340
3341                 /* use the reserved spot on the WQ for the extra first WQE */
3342                 nesqp->nesqp_context->ird_ord_sizes &=
3343                         cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
3344                                                 NES_QPCONTEXT_ORDIRD_WRPDU |
3345                                                 NES_QPCONTEXT_ORDIRD_ALSMM));
3346                 nesqp->skip_lsmm = 1;
3347                 nesqp->hwqp.sq_tail = 0;
3348                 nes_write32(nesdev->regs + NES_WQE_ALLOC,
3349                                 (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
3350         }
3351 #endif
3352
3353         memset(&nes_quad, 0, sizeof(nes_quad));
3354
3355         nes_quad.DstIpAdrIndex =
3356                 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
3357         if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
3358                 nes_quad.SrcIpadr = nesvnic->local_ipaddr;
3359         else
3360                 nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
3361         nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
3362         nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
3363
3364         /* Produce hash key */
3365         crc_value = get_crc_value(&nes_quad);
3366         nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
3367         nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
3368                         nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
3369
3370         nesqp->hte_index &= nesadapter->hte_index_mask;
3371         nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
3372
3373         nesqp->ietf_frame = &cm_node->mpa_frame;
3374         nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
3375         cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
3376
3377         /* notify OF layer we successfully created the requested connection */
3378         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3379         cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
3380         cm_event.provider_data = cm_id->provider_data;
3381         cm_event.local_addr.sin_family = AF_INET;
3382         cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
3383         cm_event.remote_addr = cm_id->remote_addr;
3384
3385         cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
3386         cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
3387
3388         cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
3389         ret = cm_id->event_handler(cm_id, &cm_event);
3390         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3391
3392         if (ret)
3393                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3394                         "ret=%d\n", __func__, __LINE__, ret);
3395         attr.qp_state = IB_QPS_RTS;
3396         nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
3397
3398         nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
3399                 "%lu\n", nesqp->hwqp.qp_id, jiffies);
3400
3401         return;
3402 }
3403
3404
3405 /**
3406  * cm_event_connect_error
3407  */
3408 static void cm_event_connect_error(struct nes_cm_event *event)
3409 {
3410         struct nes_qp *nesqp;
3411         struct iw_cm_id *cm_id;
3412         struct iw_cm_event cm_event;
3413         /* struct nes_cm_info cm_info; */
3414         int ret;
3415
3416         if (!event->cm_node)
3417                 return;
3418
3419         cm_id = event->cm_node->cm_id;
3420         if (!cm_id) {
3421                 return;
3422         }
3423
3424         nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
3425         nesqp = cm_id->provider_data;
3426
3427         if (!nesqp) {
3428                 return;
3429         }
3430
3431         /* notify OF layer about this connection error event */
3432         /* cm_id->rem_ref(cm_id); */
3433         nesqp->cm_id = NULL;
3434         cm_id->provider_data = NULL;
3435         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3436         cm_event.status = -ECONNRESET;
3437         cm_event.provider_data = cm_id->provider_data;
3438         cm_event.local_addr = cm_id->local_addr;
3439         cm_event.remote_addr = cm_id->remote_addr;
3440         cm_event.private_data = NULL;
3441         cm_event.private_data_len = 0;
3442
3443         nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
3444                 "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
3445                 cm_event.remote_addr.sin_addr.s_addr);
3446
3447         ret = cm_id->event_handler(cm_id, &cm_event);
3448         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3449         if (ret)
3450                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
3451                         "ret=%d\n", __func__, __LINE__, ret);
3452         cm_id->rem_ref(cm_id);
3453
3454         rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
3455         return;
3456 }
3457
3458
3459 /**
3460  * cm_event_reset
3461  */
3462 static void cm_event_reset(struct nes_cm_event *event)
3463 {
3464         struct nes_qp *nesqp;
3465         struct iw_cm_id *cm_id;
3466         struct iw_cm_event cm_event;
3467         /* struct nes_cm_info cm_info; */
3468         int ret;
3469
3470         if (!event->cm_node)
3471                 return;
3472
3473         if (!event->cm_node->cm_id)
3474                 return;
3475
3476         cm_id = event->cm_node->cm_id;
3477
3478         nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
3479         nesqp = cm_id->provider_data;
3480         if (!nesqp)
3481                 return;
3482
3483         nesqp->cm_id = NULL;
3484         /* cm_id->provider_data = NULL; */
3485         cm_event.event = IW_CM_EVENT_DISCONNECT;
3486         cm_event.status = IW_CM_EVENT_STATUS_RESET;
3487         cm_event.provider_data = cm_id->provider_data;
3488         cm_event.local_addr = cm_id->local_addr;
3489         cm_event.remote_addr = cm_id->remote_addr;
3490         cm_event.private_data = NULL;
3491         cm_event.private_data_len = 0;
3492
3493         cm_id->add_ref(cm_id);
3494         ret = cm_id->event_handler(cm_id, &cm_event);
3495         atomic_inc(&cm_closes);
3496         cm_event.event = IW_CM_EVENT_CLOSE;
3497         cm_event.status = IW_CM_EVENT_STATUS_OK;
3498         cm_event.provider_data = cm_id->provider_data;
3499         cm_event.local_addr = cm_id->local_addr;
3500         cm_event.remote_addr = cm_id->remote_addr;
3501         cm_event.private_data = NULL;
3502         cm_event.private_data_len = 0;
3503         nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
3504         ret = cm_id->event_handler(cm_id, &cm_event);
3505
3506         nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
3507
3508
3509         /* notify OF layer about this connection error event */
3510         cm_id->rem_ref(cm_id);
3511
3512         return;
3513 }
3514
3515
3516 /**
3517  * cm_event_mpa_req
3518  */
3519 static void cm_event_mpa_req(struct nes_cm_event *event)
3520 {
3521         struct iw_cm_id   *cm_id;
3522         struct iw_cm_event cm_event;
3523         int ret;
3524         struct nes_cm_node *cm_node;
3525
3526         cm_node = event->cm_node;
3527         if (!cm_node)
3528                 return;
3529         cm_id = cm_node->cm_id;
3530
3531         atomic_inc(&cm_connect_reqs);
3532         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3533                         cm_node, cm_id, jiffies);
3534
3535         cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
3536         cm_event.status = IW_CM_EVENT_STATUS_OK;
3537         cm_event.provider_data = (void *)cm_node;
3538
3539         cm_event.local_addr.sin_family = AF_INET;
3540         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3541         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3542
3543         cm_event.remote_addr.sin_family = AF_INET;
3544         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3545         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3546         cm_event.private_data = cm_node->mpa_frame_buf;
3547         cm_event.private_data_len  = (u8) cm_node->mpa_frame_size;
3548
3549         ret = cm_id->event_handler(cm_id, &cm_event);
3550         if (ret)
3551                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3552                                 __func__, __LINE__, ret);
3553         return;
3554 }
3555
3556
3557 static void cm_event_mpa_reject(struct nes_cm_event *event)
3558 {
3559         struct iw_cm_id   *cm_id;
3560         struct iw_cm_event cm_event;
3561         struct nes_cm_node *cm_node;
3562         int ret;
3563
3564         cm_node = event->cm_node;
3565         if (!cm_node)
3566                 return;
3567         cm_id = cm_node->cm_id;
3568
3569         atomic_inc(&cm_connect_reqs);
3570         nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
3571                         cm_node, cm_id, jiffies);
3572
3573         cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
3574         cm_event.status = -ECONNREFUSED;
3575         cm_event.provider_data = cm_id->provider_data;
3576
3577         cm_event.local_addr.sin_family = AF_INET;
3578         cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
3579         cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
3580
3581         cm_event.remote_addr.sin_family = AF_INET;
3582         cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
3583         cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
3584
3585         cm_event.private_data = cm_node->mpa_frame_buf;
3586         cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
3587
3588         nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, "
3589                         "remove_addr=%08x\n",
3590                         cm_event.local_addr.sin_addr.s_addr,
3591                         cm_event.remote_addr.sin_addr.s_addr);
3592
3593         ret = cm_id->event_handler(cm_id, &cm_event);
3594         if (ret)
3595                 printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n",
3596                                 __func__, __LINE__, ret);
3597
3598         return;
3599 }
3600
3601
3602 static void nes_cm_event_handler(struct work_struct *);
3603
3604 /**
3605  * nes_cm_post_event
3606  * post an event to the cm event handler
3607  */
3608 static int nes_cm_post_event(struct nes_cm_event *event)
3609 {
3610         atomic_inc(&event->cm_node->cm_core->events_posted);
3611         add_ref_cm_node(event->cm_node);
3612         event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
3613         INIT_WORK(&event->event_work, nes_cm_event_handler);
3614         nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
3615                 event->cm_node, event);
3616
3617         queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
3618
3619         nes_debug(NES_DBG_CM, "Exit\n");
3620         return 0;
3621 }
3622
3623
3624 /**
3625  * nes_cm_event_handler
3626  * worker function to handle cm events
3627  * will free instance of nes_cm_event
3628  */
3629 static void nes_cm_event_handler(struct work_struct *work)
3630 {
3631         struct nes_cm_event *event = container_of(work, struct nes_cm_event,
3632                         event_work);
3633         struct nes_cm_core *cm_core;
3634
3635         if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
3636                 return;
3637
3638         cm_core = event->cm_node->cm_core;
3639         nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
3640                 event, event->type, atomic_read(&cm_core->events_posted));
3641
3642         switch (event->type) {
3643         case NES_CM_EVENT_MPA_REQ:
3644                 cm_event_mpa_req(event);
3645                 nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
3646                         event->cm_node);
3647                 break;
3648         case NES_CM_EVENT_RESET:
3649                 nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
3650                         event->cm_node);
3651                 cm_event_reset(event);
3652                 break;
3653         case NES_CM_EVENT_CONNECTED:
3654                 if ((!event->cm_node->cm_id) ||
3655                         (event->cm_node->state != NES_CM_STATE_TSA))
3656                         break;
3657                 cm_event_connected(event);
3658                 nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
3659                 break;
3660         case NES_CM_EVENT_MPA_REJECT:
3661                 if ((!event->cm_node->cm_id) ||
3662                                 (event->cm_node->state == NES_CM_STATE_TSA))
3663                         break;
3664                 cm_event_mpa_reject(event);
3665                 nes_debug(NES_DBG_CM, "CM Event: REJECT\n");
3666                 break;
3667
3668         case NES_CM_EVENT_ABORTED:
3669                 if ((!event->cm_node->cm_id) ||
3670                         (event->cm_node->state == NES_CM_STATE_TSA))
3671                         break;
3672                 cm_event_connect_error(event);
3673                 nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
3674                 break;
3675         case NES_CM_EVENT_DROPPED_PKT:
3676                 nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
3677                 break;
3678         default:
3679                 nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
3680                 break;
3681         }
3682
3683         atomic_dec(&cm_core->events_posted);
3684         event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
3685         rem_ref_cm_node(cm_core, event->cm_node);
3686         kfree(event);
3687
3688         return;
3689 }